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General Partner’s interest in net income

30,182

18,275

175

105

Limited Partners’ interest in net income

$ 30,007

$ 18,170

Basic and diluted income per Limited Partner Unit

^[2]

$ 0.45

$ 0.28

Weighted average number of Limited Partner units outstanding:

Basic and Diluted

55,887

[1]	Represents the change in value of unrealized open positions and expired options.
[2]	See Note 13 - Earnings Per Limited Partner Unit.

CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands

3 Months Ended

Dec. 31, 2017

Dec. 31, 2016

Statement Of Income And Comprehensive Income [Abstract]

Unrealized gain on pension plan obligation (1)

$ 30,182

$ 18,275

Other comprehensive income:

^[1]

448

534

Tax effect of unrealized gain on pension plan

(135)

(216)

Total other comprehensive income

313

318

Total comprehensive income

$ 30,495

$ 18,593

[1]	This item is included in the computation of net periodic pension cost.

CONDENSED CONSOLIDATED STATEMENT OF PARTNERS' CAPITAL - 3 months ended Dec. 31, 2017 - USD ($)
shares in Thousands, $ in Thousands

Total

General Partner

Common Stock

Accumulated Other Comprehensive Income (Loss)

Beginning Balance at Sep. 30, 2017

$ 306,068

$ (929)

$ 325,762

$ (18,765)

Beginning Balance, unit at Sep. 30, 2017

326

55,887

Unrealized gain on pension plan obligation (1)

30,182

$ 175

$ 30,007

448

^[1]

448

Tax effect of unrealized gain on pension plan

(135)

Distributions

(6,302)

(154)

(6,148)

Ending Balance at Dec. 31, 2017

$ 330,261

$ (908)

$ 349,621

$ (18,452)

Ending Balance, Unit at Dec. 31, 2017

326

55,887

[1]	This item is included in the computation of net periodic pension cost.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands

3 Months Ended

Dec. 31, 2017

Dec. 31, 2016

Cash flows provided by (used in) operating activities:

Adjustment to reconcile net income to net cash provided by (used in) operating activities:

$ 30,182

$ 18,275

(Increase) decrease in the fair value of derivative instruments

^[1]

(11,400)

(8,551)

Depreciation and amortization

8,050

6,873

Provision for losses on accounts receivable

311

Change in deferred taxes

(2,740)

3,941

Changes in operating assets and liabilities:

Increase in receivables

(96,193)

(76,845)

Increase in inventories

(11,886)

(16,248)

Increase in other assets

(12,411)

(3,294)

Increase in accounts payable

27,158

21,725

Decrease in customer credit balances

(14,294)

(22,805)

Increase in other current and long-term liabilities

19,987

11,392

Net cash used in operating activities

(63,236)

(65,506)

Cash flows provided by (used in) investing activities:

Capital expenditures

(3,604)

(4,521)

Proceeds from sales of fixed assets

Purchase of investments

^[2]

(34,151)

(11,474)

Acquisitions

(224)

(5,835)

Net cash used in investing activities

(37,891)

(21,796)

Cash flows provided by (used in) financing activities:

Revolving credit facility borrowings

79,149

Term loan repayment

(2,500)

(8,700)

Distributions

(6,302)

(5,860)

Customer retainage payments

(539)

Net cash provided by (used in) financing activities

69,808

(14,560)

Net decrease in cash, cash equivalents, and restricted cash

(31,319)

(101,862)

Cash, cash equivalents, and restricted cash at beginning of period

52,708

139,188

Cash, cash equivalents, and restricted cash at end of period

$ 21,389

$ 37,326

[1]	Represents the change in value of unrealized open positions and expired options.
[2]	See Note 2 – Captive insurance collateral

Organization

3 Months Ended

Dec. 31, 2017

Accounting Policies [Abstract]

Organization

1) Organization

Star Group, L.P. (“Star” the “Company,” “we,” “us,” or “our”) is a full service provider specializing in the sale of home heating products and services to residential and commercial customers. The Company also services and sells heating and air conditioning equipment to its home heating oil and propane customers and to a lesser extent, provides these offerings to customers outside of our home heating oil and propane customer base. In certain of our marketing areas, we provide home security and plumbing services primarily to our home heating oil and propane customer base. We also sell diesel fuel, gasoline and home heating oil on a delivery only basis. These products and services are offered through our home heating oil and propane locations. The Company has one reportable segment for accounting purposes. We believe we are the nation’s largest retail distributor of home heating oil based upon sales volume. Including our propane locations, we serve customers in the more northern and eastern states within the Northeast, Central and Southeast U.S. regions.

The Company is organized as follows:

•

Star is a limited partnership, which at December 31, 2017, had outstanding 55.9 million Common Units (NYSE: “SGU”), representing a 99.4% limited partner interest in Star, and 0.3 million general partner units, representing a 0.6% general partner interest in Star. Our general partner is Kestrel Heat, LLC, a Delaware limited liability company (“Kestrel Heat” or the “general partner”). The Board of Directors of Kestrel Heat (the “Board”) is appointed by its sole member, Kestrel Energy Partners, LLC, a Delaware limited liability company (“Kestrel”).

•

Star owns 100% of Star Acquisitions, Inc. (“SA”), a Minnesota corporation that owns 100% of Petro Holdings, Inc. (“Petro”). SA and its subsidiaries are subject to Federal and state corporate income taxes. Star’s operations are conducted through Petro and its subsidiaries. Petro is primarily a Northeast, Central and Southeast region retail distributor of home heating oil and propane that at December 31, 2017 served approximately 461,000 full-service residential and commercial home heating oil and propane customers. Petro also sold diesel fuel, gasoline and home heating oil to approximately 76,000 customers on a delivery only basis. We installed, maintained, and repaired heating and air conditioning equipment and to a lesser extent provided these services outside our customer base including 14,000 service contracts for natural gas and other heating systems. In addition, we provided home security and plumbing, to approximately 31,000 customers.

•

Petroleum Heat and Power Co., Inc. (“PH&P”) is a 100% owned subsidiary of Star. PH&P is the borrower and Star is the guarantor of the third amended and restated credit agreement’s five-year senior secured term loan and the $300 million ($450 million during the heating season of December through April of each year) revolving credit facility, both due July 30, 2020. (See Note 9—Long-Term Debt and Bank Facility Borrowings).

Summary of Significant Accounting Policies	3 Months Ended
Summary of Significant Accounting Policies	Dec. 31, 2017
Accounting Policies [Abstract]
Summary of Significant Accounting Policies	2) Summary of Significant Accounting Policies Basis of Presentation The Consolidated Financial Statements include the accounts of Star Group, L.P. and its subsidiaries. All material intercompany items and transactions have been eliminated in consolidation. The financial information included herein is unaudited; however, such information reflects all adjustments (consisting solely of normal recurring adjustments), which are, in the opinion of management, necessary for the fair statement of financial condition and results for the interim periods. Due to the seasonal nature of the Company’s business, the results of operations and cash flows for the three month period ended December 31, 2017 are not necessarily indicative of the results to be expected for the full year. These interim financial statements of the Company have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) for interim financial information and Rule 10-01 of Regulation S-X of the U.S. Securities and Exchange Commission and should be read in conjunction with the financial statements included in the Company’s Annual Report on Form 10-K for the year ended September 30, 2017. Comprehensive Income Comprehensive income is comprised of Net income and Other comprehensive income. Other comprehensive income consists of the unrealized gain amortization on the Company’s pension plan obligation for its two frozen defined benefit pension plans, and the corresponding tax effect. Cash, Cash Equivalents, and Restricted Cash The Company considers all highly liquid investments with an original maturity of three months or less, when purchased, to be cash equivalents. At December 31, 2017, the $21.4 million of cash, cash equivalents, and restricted cash on the condensed consolidated statement of cash flows is composed of $21.1 million of cash and cash equivalents and $0.3 million of restricted cash. At September 30, 2017, the $52.7 million of cash, cash equivalents, and restricted cash on the condensed consolidated statements of cash flow is composed of $52.5 million of cash and cash equivalents and $0.3 million of restricted cash. Restricted cash represents deposits held by our captive insurance company that are required by state insurance regulations to remain in the captive insurance company as cash. Captive Insurance Collateral At December 31, 2017 captive insurance collateral is comprised of $45.1 million of Level 1 debt securities measured at fair value and $0.7 million of mutual funds measured at net asset value. At September 30, 2017 the balance was comprised of $11.3 million of Level 1 debt securities measured at fair value and $0.5 million of mutual funds measured at net asset value. The investments are held by our captive insurance company in an irrevocable trust as collateral for certain workers’ compensation, general and automobile liability claims. The collateral is required by a third party insurance carrier that insures per claim amounts above a set deductible. Due to the expected timing of claim payments, the nature of the collateral agreement with the carrier, and our captive insurance company’s source of other operating cash, the collateral is not expected to be used to pay obligations within the next twelve months. At September 30, 2017 the investments were held for workers’ compensation, general and automobile liability claims incurred and expected to be incurred in fiscal 2017. In the first quarter of fiscal 2018 we deposited $34.2 million of cash into the irrevocable trust to secure certain workers’ compensation, general and automobile liability claims incurred and expected to be incurred from fiscal 2004 to fiscal 2016 and fiscal 2018. Weather Hedge Contract To partially mitigate the adverse effect of warm weather on cash flows, the Company has used weather hedge contracts for a number of years. Weather hedge contracts are recorded in accordance with the intrinsic value method defined by the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 815-45-15 Derivatives and Hedging, Weather Derivatives (EITF 99-2). The premium paid is included in the caption Prepaid expenses and other current assets in the accompanying balance sheets and amortized over the life of the contract, with the intrinsic value method applied at each interim period. The Company has weather hedge contracts for fiscal years 2017, 2018 and 2019. Under these contracts, we are entitled to receive a payment if the total number of degree days within the hedge period is less than the ten year average. The “Payment Thresholds,” or strikes, are set at various levels. In addition, we will be obligated to make a payment capped at $5.0 million if degree days exceed the ten year average. The hedge period runs from November 1 through March 31, taken as a whole, for each respective fiscal year. For fiscal 2018 the maximum that the Company can receive is $17.5 million and the maximum that the Company would be obligated to pay is $5.0 million. For fiscal 2019 the maximum that the Company can receive is $12.5 million and the maximum that the Company would be obligated to pay is $5.0 million. In accordance with ASC 815-45-15, as of December 31, 2017, the Company recorded a charge of $3.1 million under this contract that increased delivery and branch expenses. No credit was recorded as of December 31, 2016. New England Teamsters and Trucking Industry Pension Fund (“the NETTI Fund”) Liability As of December 31, 2017, we had $0.2 million and $17.3 million balances included in the captions Accrued expenses and other current liabilities and Other long-term liabilities, respectively, on our condensed consolidated balance sheet representing the remaining balance of the NETTI withdrawal liability. Based on the borrowing rates currently available to the Company for long-term financing of a similar maturity, the fair value of the NETTI withdrawal liability as of December 31, 2017 was $22.3 million. We utilized Level 2 inputs in the fair value hierarchy of valuation techniques to determine the fair value of this liability. Recently Adopted Accounting Pronouncements In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory. The update changes the measurement principle for inventory from the lower of cost or market to the lower of cost and net realizable value. The Company adopted the ASU effective December 31, 2017. The adoption of ASU No. 2015-11 did not have an impact on the Company’s consolidated financial statements and related disclosures. Recently Issued Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The FASB has also issued several updates to ASU 2014-09. This ASU will replace most existing revenue recognition guidance in GAAP when it becomes effective. This new guidance is effective for our annual reporting period beginning in the first quarter of fiscal 2019, with early adoption permitted beginning in the first quarter of fiscal 2018. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is in the process of evaluating the effect that ASU 2014-09 will have on its revenue streams, consolidated financial statements and related disclosures. The Company has not yet selected a transition method, nor does it intend to early adopt. In February 2016, the FASB issued ASU No. 2016-02, Leases. The update requires all leases with a term greater than twelve months to be recognized on the balance sheet by calculating the discounted present value of such leases and accounting for them through a right-of-use asset and an offsetting lease liability, and the disclosure of key information pertaining to leasing arrangements. This new guidance is effective for our annual reporting period beginning in the first quarter of fiscal 2020, with early adoption permitted. The Company does not intend to early adopt. The Company is continuing to evaluate the effect that ASU No. 2016-02 could have on its consolidated financial statements and related disclosures, but has not yet selected a transition method. The new guidance will materially change how we account for operating leases for office space, trucks and other equipment. Upon adoption, we expect to recognize discounted right-of-use assets and offsetting lease liabilities related to our operating leases of office space, trucks and other equipment. As of December 31, 2017, the undiscounted future minimum lease payments through 2032 for such operating leases are approximately $131.1 million, but what amount of leasing activity is expected between December 31, 2017, and the date of adoption, is currently unknown. For this reason we are unable to estimate the discounted right-of-use assets and lease liabilities as of the date of adoption. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses. The update broadens the information that an entity should consider in developing expected credit loss estimates, eliminates the probable initial recognition threshold, and allows for the immediate recognition of the full amount of expected credit losses. This new guidance is effective for our annual reporting period beginning in the first quarter of fiscal 2021, with early adoption permitted in the first quarter of fiscal 2020. The Company is evaluating the effect that ASU No. 2016-13 will have on its consolidated financial statements and related disclosures, but has not yet determined the timing of adoption. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flow (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The update addresses the issues of debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate owned life insurance policies, distributions received from equity method investees, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. This new guidance is effective for our annual reporting period beginning in the first quarter of fiscal 2019, with early adoption permitted. The Company has not determined the timing of adoption, but does not expect ASU 2016-15 to have a material impact on its consolidated financial statements and related disclosures. In January 2017, the FASB issued ASU No. 2017-01, Business Combinations (Topic 805): Clarifying the definition of a business. The update clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. This new guidance is effective for our annual reporting period beginning in the first quarter of fiscal 2019, with early adoption permitted. The Company has not determined the timing of adoption, but does not expect ASU 2017-01 to have a material impact on its consolidated financial statements and related disclosures. In January 2017, the FASB issued ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 230): Simplifying the test for goodwill impairment. The update simplifies how an entity is required to test goodwill for impairment. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value, but not exceed the total amount of goodwill allocated to the reporting unit. This new guidance is effective for our annual reporting period beginning in the first quarter of fiscal 2021, with early adoption permitted. The Company has not determined the timing of adoption, but does not expect ASU 2017-04 to have a material impact on its consolidated financial statements and related disclosures.

Common Unit Repurchase Plans and Retirement

3 Months Ended

Dec. 31, 2017

Equity [Abstract]

Common Unit Repurchase Plans and Retirement

3) Common Unit Repurchase and Retirement

In July 2012, the Board authorized the repurchase of up to 3.0 million of the Company’s Common Units (“Plan III”). In July 2013, the Board authorized the repurchase of an additional 1.9 million Common Units under Plan III. The authorized Common Unit repurchases may be made from time to time in the open market, in privately negotiated transactions or in such other manner deemed appropriate by management. There is no guarantee of the exact number of units that will be purchased under the program and the Company may discontinue purchases at any time. The program does not have a time limit. The Board may also approve additional purchases of units from time to time in private transactions. The Company’s repurchase activities take into account SEC safe harbor rules and guidance for issuer repurchases. All of the Common Units purchased in the repurchase program will be retired.

Under the Company’s third amended and restated credit agreement dated July 30, 2015, in order to repurchase Common Units we must maintain Availability (as defined in the amended and restated credit agreement) of $45 million, 15.0% of the facility size of $300 million (assuming the non-seasonal aggregate commitment is in effect) on a historical pro forma and forward-looking basis, and a fixed charge coverage ratio of not less than 1.15 measured as of the date of repurchase. The Company was in compliance with this covenant as of December 31, 2017.

The following table shows repurchases under Plan III.

(in thousands, except per unit amounts) Period	Total Number of Units Purchased (a)		Average Price Paid per Unit (b)		Maximum Number of Units that May Yet Be Purchased
Plan III - Number of units authorized						4,894
Private transaction - Number of units authorized						2,450
						7,344
Plan III - Fiscal years 2012 to 2017 total (c)		5,137	$	5.78		2,207

Plan III - First quarter fiscal year 2018 total		-	$	-		2,207

(a)	Units were repurchased as part of a publicly announced program, except as noted in a private transaction.

(b)	Amounts include repurchase costs.

(c)	Includes 2.45 million common units acquired in a private transaction.

Derivatives and Hedging-Disclosures and Fair Value Measurements

3 Months Ended

Dec. 31, 2017

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Derivatives and Hedging-Disclosures and Fair Value Measurements

4) Derivatives and Hedging—Disclosures and Fair Value Measurements

FASB ASC 815-10-05 Derivatives and Hedging, established accounting and reporting standards requiring that derivative instruments be recorded at fair value and included in the consolidated balance sheet as assets or liabilities, along with qualitative disclosures regarding the derivative activity. The Company uses derivative instruments such as futures, options and swap agreements in order to mitigate exposure to market risk associated with the purchase of home heating oil for price-protected customers, physical inventory on hand, inventory in transit, priced purchase commitments and internal fuel usage. The Company has elected not to designate its derivative instruments as hedging derivatives, but rather as economic hedges whose change in fair value is recognized in its statement of operations in the line item (increase) decrease in the fair value of derivative instruments. Depending on the risk being economically hedged, realized gains and losses are recorded in cost of product, cost of installations and services, or delivery and branch expenses.

As of December 31, 2017, to hedge a substantial majority of the purchase price associated with heating oil gallons anticipated to be sold to its price-protected customers, the Company held the following derivative instruments that settle in future months to match anticipated sales: 17.9 million gallons of swap contracts, 7.3 million gallons of call options, 8.7 million gallons of put options, and 83.9 million net gallons of synthetic call options. To hedge the inter-month differentials for its price-protected customers, its physical inventory on hand and inventory in transit, the Company, as of December 31, 2017, had 27.8 million gallons of long future contracts, and 55.1 million gallons of short future contracts that settle in future months. To hedge its internal fuel usage and other related activities for fiscal 2018, the Company, as of December 31, 2017, had 2.3 million gallons of swap contracts that settle in future months.

As of December 31, 2016, to hedge a substantial majority of the purchase price associated with heating oil gallons anticipated to be sold to its price-protected customers, the Company held the following derivative instruments that settle in future months to match anticipated sales: 14.0 million gallons of swap contracts, 7.6 million gallons of call options, 9.0 million gallons of put options, and 89.2 million net gallons of synthetic call options. To hedge the inter-month differentials for its price-protected customers, its physical inventory on hand and inventory in transit, the Company, as of December 31, 2016, had 1.0 million gallons of long swap contracts, 23.5 million gallons of long future contracts, and 44.7 million gallons of short future contracts that settle in future months. In addition to the previously described hedging instruments, the Company as of December 31, 2016, had 5.1 million gallons of spread contracts (simultaneous long and short positions) to lock-in the differential between high sulfur home heating oil and ultra low sulfur diesel. To hedge its internal fuel usage and other related activities for fiscal 2017, the Company, as of December 31, 2016, had 4.2 million gallons of swap contracts that settle in future months.

The Company’s derivative instruments are with the following counterparties: Bank of America, N.A., Bank of Montreal, Cargill, Inc., Citibank, N.A., JPMorgan Chase Bank, N.A., Key Bank, N.A., Munich Re Trading LLC, Regions Financial Corporation, Societe Generale, and Wells Fargo Bank, N.A. The Company assesses counterparty credit risk and considers it to be low. We maintain master netting arrangements that allow for the non-conditional offsetting of amounts receivable and payable with counterparties to help manage our risks and record derivative positions on a net basis. The Company generally does not receive cash collateral from its counterparties and does not restrict the use of cash collateral it maintains at counterparties. At December 31, 2017, the aggregate cash posted as collateral in the normal course of business at counterparties was $1.5 million and recorded in prepaid expense and other current assets. Positions with counterparties who are also parties to our credit agreement are collateralized under that facility. As of December 31, 2017, no hedge positions and payable amounts were secured under the credit facility.

FASB ASC 820-10 Fair Value Measurements and Disclosures, established a three-tier fair value hierarchy, which classified the inputs used in measuring fair value. These tiers include: Level 1, defined as observable inputs such as quoted prices for identical instruments in active markets; Level 2, defined as inputs other than quoted prices in active markets that are either directly or indirectly observable; and Level 3, defined as unobservable inputs in which little or no market data exists, therefore requiring an entity to develop its own assumptions. The Company’s Level 1 derivative assets and liabilities represent the fair value of commodity contracts used in its hedging activities that are identical and traded in active markets. The Company’s Level 2 derivative assets and liabilities represent the fair value of commodity contracts used in its hedging activities that are valued using either directly or indirectly observable inputs, whose nature, risk and class are similar. No significant transfers of assets or liabilities have been made into and out of the Level 1 or Level 2 tiers. All derivative instruments were non-trading positions and were either a Level 1 or Level 2 instrument. The Company had no Level 3 derivative instruments. The fair market value of our Level 1 and Level 2 derivative assets and liabilities are calculated by our counter-parties and are independently validated by the Company. The Company’s calculations are, for Level 1 derivative assets and liabilities, based on the published New York Mercantile Exchange (“NYMEX”) market prices for the commodity contracts open at the end of the period. For Level 2 derivative assets and liabilities the calculations performed by the Company are based on a combination of the NYMEX published market prices and other inputs, including such factors as present value, volatility and duration.

The Company had no assets or liabilities that are measured at fair value on a nonrecurring basis subsequent to their initial recognition. The Company’s financial assets and liabilities measured at fair value on a recurring basis are listed on the following table.

(In thousands)					Fair Value Measurements at Reporting Date Using:
Derivatives Not Designated as Hedging Instruments					Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs
Under FASB ASC 815-10	Balance Sheet Location	Total			Level 1		Level 2
Asset Derivatives at December 31, 2017
Commodity contracts	Fair asset and fair liability value of derivative instruments	$	19,220		$	-	$	19,220
Commodity contracts	Long-term derivative assets included in the deferred charges and other assets, net balance		755		$	-		755
Commodity contract assets at December 31, 2017		$	19,975		$	-	$	19,975
Liability Derivatives at December 31, 2017
Commodity contracts	Fair liability and fair asset value of derivative instruments	$	-		$	-	$	-
Commodity contracts	Long-term derivative liabilities included in the deferred charges and other assets, net balance		(6	)				(6	)
Commodity contract liabilities at December 31, 2017		$	(6	)	$	-	$	(6	)
Asset Derivatives at September 30, 2017
Commodity contracts	Fair asset and fair liability value of derivative instruments	$	7,729		$	-	$	7,729
Commodity contracts	Long-term derivative assets included in the deferred charges and other assets, net balance		996			-		996
Commodity contract assets at September 30, 2017		$	8,725		$	-	$	8,725
Liability Derivatives at September 30, 2017
Commodity contracts	Fair liability and fair asset value of derivative instruments	$	(2,086	)	$	-	$	(2,086	)
Commodity contracts	Long-term derivative liabilities included in the deferred charges and other assets, net and other long-term liabilities balances		(731	)		-		(731	)
Commodity contract liabilities at September 30, 2017		$	(2,817	)			$	(2,817	)

The Company’s derivative assets (liabilities) offset by counterparty and subject to an enforceable master netting arrangement are listed on the following table.

(In thousands)									Gross Amounts Not Offset in the Statement of Financial Position
Offsetting of Financial Assets (Liabilities) and Derivative Assets (Liabilities)	Gross Assets Recognized		Gross Liabilities Offset in the Statement of Financial Position			Net Assets (Liabilities) Presented in the Statement of Financial Position			Financial Instruments		Cash Collateral Received		Net Amount
Fair asset value of derivative instruments	$	19,220	$	-		$	19,220		$	-			$	19,220
Long-term derivative assets included in deferred charges and other assets, net		755		(6	)		749			-		-		749
Fair liability value of derivative instruments		-		-			-			-		-		-
Long-term derivative liabilities included in other long-term liabilities, net		-		-			-			-		-		-
Total at December 31, 2017	$	19,975	$	(6	)	$	19,969		$	-	$	-	$	19,969
Fair asset value of derivative instruments	$	6,023	$	(91	)	$	5,932		$	-	$	-	$	5,932
Long-term derivative assets included in other long-term assets, net		996		(730	)		266			-		-		266
Fair liability value of derivative instruments		1,706		(1,995	)		(289	)		-		-		(289	)
Long-term derivative liabilities included in other long-term liabilities, net		-		(1	)		(1	)		-		-		(1	)
Total at September 30, 2017	$	8,725	$	(2,817	)	$	5,908		$	-	$	-	$	5,908

(In thousands)
The Effect of Derivative Instruments on the Statement of Operations
		Amount of (Gain) or Loss Recognized
Derivatives Not Designated as Hedging Instruments Under FASB ASC 815-10	Location of (Gain) or Loss Recognized in Income on Derivative	Three Months Ended December 31, 2017			Three Months Ended December 31, 2016
Commodity contracts	Cost of product (a)	$	184		$	3,381
Commodity contracts	Cost of installations and service (a)	$	(582	)	$	(94	)
Commodity contracts	Delivery and branch expenses (a)	$	(1,229	)	$	(117	)
Commodity contracts	(Increase) / decrease in the fair value of derivative instruments (b)	$	(11,400	)	$	(8,551	)

(a)	Represents realized closed positions and includes the cost of options as they expire.

(b)	Represents the change in value of unrealized open positions and expired options.

Inventories

3 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Inventories

5) Inventories

The Company’s product inventories are stated at the lower of cost and net realizable value computed on the weighted average cost method. All other inventories, representing parts and equipment are stated at the lower of cost and net realizable value using the FIFO method. The components of inventory were as follows (in thousands):

	December 31, 2017		September 30, 2017
Product	$	49,842	$	37,941
Parts and equipment		21,662		21,655
Total inventory	$	71,504	$	59,596

Property and Equipment

3 Months Ended

Dec. 31, 2017

Property Plant And Equipment [Abstract]

Property and Equipment

6) Property and Equipment

Property and equipment are stated at cost. Depreciation is computed over the estimated useful lives of the depreciable assets using the straight-line method (in thousands):

	December 31, 2017		September 30, 2017
Property and equipment	$	203,674	$	201,312
Less: accumulated depreciation		124,136		121,639
Property and equipment, net	$	79,538	$	79,673

Business Combinations	3 Months Ended
Business Combinations	Dec. 31, 2017
Business Combinations [Abstract]
Business Combinations	7) Business Combinations During fiscal 2018, the Company acquired two heating oil dealers for an aggregate purchase price of approximately $0.3 million. The acquired companies’ operating results are included in the Company’s consolidated financial statements starting on their respective acquisition dates, and are not material to the Company’s financial condition, results of operations, or cash flows.

Goodwill and Intangibles, net

3 Months Ended

Dec. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Goodwill and Intangibles, net

8) Goodwill and Intangibles, net

Goodwill

A summary of changes in the Company’s goodwill is as follows (in thousands):

Balance as of September 30, 2017	$	225,915
Fiscal year 2018 business combinations		63
Balance as of December 31, 2017	$	225,978

Intangibles, net

The gross carrying amount and accumulated amortization of intangible assets subject to amortization are as follows (in thousands):

	December 31, 2017						September 30, 2017
	Gross						Gross
	Carrying		Accum.				Carrying		Accum.
	Amount		Amortization		Net		Amount		Amortization		Net
Customer lists	$	346,995	$	268,362	$	78,633	$	346,784	$	264,632	$	82,152
Trade names and other intangibles		32,047		10,037		22,010		32,047		8,981		23,066
Total	$	379,042	$	278,399	$	100,643	$	378,831	$	273,613	$	105,218

Amortization expense for intangible assets was $4.7 million for the three months ended December 31, 2017, compared to $3.9 million for the three months ended December 31, 2016.

Long-Term Debt and Bank Facility Borrowings

The entire disclosure for the aggregate amount of goodwill and a description of intangible assets, which may include (a) for amortizable intangible assets (also referred to as finite-lived intangible assets), the carrying amount, the amount of any significant residual value, and the weighted-average amortization period, (b) for intangible assets not subject to amortization (also referred to as indefinite-lived intangible assets), the carrying amount, and (c) the amount of research and development assets acquired and written off in the period, including the line item in the income statement in which the amounts written off are aggregated, if not readily apparent from the income statement. Also discloses (a) for amortizable intangibles assets in total and by major class, the gross carrying amount and accumulated amortization, the total amortization expense for the period, and the estimated aggregate amortization expense for each of the five succeeding fiscal years, (b) for intangible assets not subject to amortization the carrying amount in total and by major class, and (c) for goodwill, in total and for each reportable segment, the changes in the carrying amount of goodwill during the period (including the aggregate amount of goodwill acquired, the aggregate amount of impairment losses recognized, and the amount of goodwill included in the gain (loss) on disposal of a reporting unit). If any part of goodwill has not been allocated to a reportable segment, discloses the unallocated amount and the reasons for not allocating. For each impairment loss recognized related to an intangible asset (excluding goodwill), discloses: (a) a description of the impaired intangible asset and the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method for determining fair value, (c) the caption in the income statement or the statement of activities in which the impairment loss is aggregated, and (d) the segment in which the impaired intangible asset is reported. For each goodwill impairment loss recognized, discloses: (a) a description of the facts and circumstances leading to the impairment, (b) the amount of the impairment loss and the method of determining the fair value of the associated reporting unit, and (c) if a recognized impairment loss is an estimate not finalized and the reasons why the estimate is not final. May also disclose the nature and amount of any significant adjustments made to a previous estimate of an impairment loss.

+ References + Details

Long-Term Debt and Bank Facility Borrowings

3 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

9) Long-Term Debt and Bank Facility Borrowings

The Company’s debt is as follows (in thousands):

	December 31,				September 30,
	2017				2017
	Carrying Amount		Fair Value (a)		Carrying Amount		Fair Value (a)
Revolving Credit Facility Borrowings	$	79,149	$	79,149	$	-	$	-
Senior Secured Term Loan (b)		73,278		73,800		75,717		76,300
Total debt	$	152,427	$	152,949	$	75,717	$	76,300
Total long-term portion of debt (b)	$	63,278	$	63,800	$	65,717	$	66,300

(a)	The face amount of the Company’s variable rate long-term debt approximates fair value.

(b)	Carrying amounts are net of unamortized debt issuance costs of $0.5 million as December 31, 2017 and $0.6 million as of September 30, 2017.

On July 30, 2015, the Company entered into a third amended and restated asset-based credit agreement with a bank syndicate comprised of thirteen participants, which enables the Company to borrow up to $300 million ($450 million during the heating season of December through April of each year) on a revolving credit facility for working capital purposes (subject to certain borrowing base limitations and coverage ratios), provides for a $100 million five-year senior secured term loan (the “Term Loan”), allows for the issuance of up to $100 million in letters of credit, and has a maturity date of July 30, 2020.

The Company can increase the revolving credit facility size by $100 million without the consent of the bank group. However, the bank group is not obligated to fund the $100 million increase. If the bank group elects not to fund the increase, the Company can add additional lenders to the group, with the consent of the Agent (as defined in the credit agreement), which shall not be unreasonably withheld. Obligations under the third amended and restated credit facility are guaranteed by the Company and its subsidiaries and are secured by liens on substantially all of the Company’s assets including accounts receivable, inventory, general intangibles, real property, fixtures and equipment.

All amounts outstanding under the third amended and restated revolving credit facility become due and payable on the facility termination date of July 30, 2020. The Term Loan is repayable in quarterly payments of $2.5 million, plus an annual payment equal to 25% of the annual Excess Cash Flow as defined in the agreement (an amount not to exceed $15 million annually), less certain voluntary prepayments made during the year, with final payment at maturity.

The interest rate on the third amended and restated revolving credit facility and the Term Loan is based on a margin over LIBOR or a base rate. At December 31, 2017, the effective interest rate on the Term Loan was approximately 4.3% and the effective interest rate on revolving credit facility borrowings was approximately 4.5%.

The Commitment Fee on the unused portion of the revolving credit facility is 0.30% from December through April, and 0.20% from May through November.

The third amended and restated credit agreement requires the Company to meet certain financial covenants, including a fixed charge coverage ratio (as defined in the credit agreement) of not less than 1.1 as long as the Term Loan is outstanding or revolving credit facility availability is less than 12.5% of the facility size. In addition, as long as the Term Loan is outstanding, a senior secured leverage ratio at any time cannot be more than 3.0 as calculated during the quarters ending June or September, and at any time no more than 4.5 as calculated during the quarters ending December or March.

Certain restrictions are also imposed by the agreement, including restrictions on the Company’s ability to incur additional indebtedness, to pay distributions to unitholders, to pay certain inter-company dividends or distributions, make investments, grant liens, sell assets, make acquisitions and engage in certain other activities.

At December 31, 2017, $73.8 million of the Term Loan was outstanding, $79.1 million was outstanding under the revolving credit facility, no hedge positions were secured under the credit agreement, and $7.3 million of letters of credit were issued and outstanding. At September 30, 2017, $76.3 million of the Term Loan was outstanding, no amount was outstanding under the revolving credit facility, $0.1 million of hedge positions were secured under the credit agreement, and $48 million of letters of credit were issued and outstanding.

At December 31, 2017, availability was $185.8 million, and the Company was in compliance with the fixed charge coverage ratio and the senior secured leverage ratio. At September 30, 2017, availability was $166.1 million, and the Company was in compliance with the fixed charge coverage ratio and the senior secured leverage ratio.

Income Taxes

3 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

Income Taxes

10) Income Taxes

At a special meeting held October 25, 2017, unitholders voted in favor of proposals to have the Company be treated as a corporation effective November 1, 2017, instead of a partnership, for federal income tax purposes (commonly referred to as a “check-the-box” election) along with amendments to our Partnership Agreement to effect such changes in income tax classification. For corporate subsidiaries of the Company, a consolidated Federal income tax return is filed. Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amount of assets and liabilities and their respective tax bases and operating loss carry-forwards. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years in which those temporary differences are expected to be recovered or settled. A valuation allowance is recognized if, based on the weight of available evidence including historical tax losses, it is more likely than not that some or all of deferred tax assets will not be realized.

On December 22, 2017, the Tax Cuts and Jobs Act (the “Tax Reform Act”) was enacted into law. The Tax Reform Act is a complicated piece of legislation that, among other provisions, contains several key provisions which impact the Company, especially the reduction of the Federal corporate income tax rate from 35% to 21% effective January 1, 2018.

Given the significance and complexity of the legislation, the SEC staff issued Staff Accounting Bulletin No. 118 (SAB 118), which allows registrants to record provisional amounts during a one year “measurement period” similar to that used when accounting for business combinations. During the measurement period, impacts of the law are expected to be recorded at the time a reasonable estimate for all or a portion of the effects can be made, and provisional amounts can be recognized and adjusted as information becomes available, prepared or analyzed.

As of December 31, 2017, the income tax benefit is based, in part, on a reasonable estimate of deferred tax balances as of the enactment of the Tax Reform Act. The estimate of such deferred tax balances is provisional. The provisional re-measurement of the deferred tax assets and liabilities resulted in an $11.5 million discrete tax benefit recorded in the quarter ended December 31, 2017. The provisional re-measurement amount is anticipated to change as data becomes available allowing more accurate scheduling of certain deferred tax assets and liabilities. We anticipate finalizing and recording any resulting adjustments by the end of our current fiscal year ending September 30, 2018.

The effective tax rate for the quarter ended December 31, 2017 is negative 5.3%. The income tax provision for the quarter reflects the application of blended statutory rates for calendar years 2017 and 2018 to the quarter’s results, as well as recognition of the $11.5 million provisional tax benefit due to reduction in the Federal corporate tax rate. As a result of the tax reform, the Company’s net deferred tax liability will be realized at a lower statutory tax rate than when originally recorded, resulting in the aforementioned tax benefit. Excluding the impact of this net deferred tax liability related tax benefit our effective income tax rate decreased from 41.3% at December 31, 2016 to 34.7% at December 31, 2017 primarily due to the lower enacted Federal statutory tax rate.

The accompanying financial statements are reported on a fiscal year, however, the Company and its corporate subsidiaries file Federal and State income tax returns on a calendar year.

The current and deferred income tax (benefit) and expenses for the three months ended December 31, 2017, and 2016 are as follows:

	Three Months Ended
	December 31,
(in thousands)	2017			2016
Income before income taxes	$	28,670		$	31,138
Current tax expense		1,228			8,922

Deferred tax expense		8,712			3,941
Deferred tax benefit - impact of tax reform		(11,452	)		-
Total deferred tax (benefit) expense		(2,740	)		3,941
Total tax (benefit) expense	$	(1,512	)	$	12,863

The provision for income taxes differs from income taxes computed at the Federal statutory rate as a result of the following (in thousands):

	Three Months Ended
	December 31,
(in thousands)	2017			2016
Income before income taxes	$	28,670		$	31,138

Tax at Federal statutory rate		7,024			10,898
Impact of Partnership loss not subject to federal income taxes		51			146
State taxes net of federal benefit		2,522			1,819
Deferred tax benefit - impact of tax reform		(11,452	)		-
Other		343			-
Total tax (benefit) expense	$	(1,512	)	$	12,863

At December 31, 2017, we did not have unrecognized income tax benefits.

Our continuing practice is to recognize interest and penalties related to income tax matters as a component of income tax expense. We file U.S. Federal income tax returns and various state and local returns. A number of years may elapse before an uncertain tax position is audited and finally resolved. For our Federal income tax returns we have four tax years subject to examination. In our major state tax jurisdictions of New York, Connecticut, Pennsylvania we have four years that are subject to examination. In the state tax jurisdictions of New Jersey we have five tax years that are subject to examination. While it is often difficult to predict the final outcome or the timing of resolution of any particular uncertain tax position, based on our assessment of many factors including past experience and interpretation of tax law, we believe that our provision for income taxes reflect the most probable outcome. This assessment relies on estimates and assumptions and may involve a series of complex judgments about future events.

Supplemental Disclosure of Cash Flow Information

3 Months Ended

Dec. 31, 2017

Supplemental Cash Flow Elements [Abstract]

Supplemental Disclosure of Cash Flow Information

11) Supplemental Disclosure of Cash Flow Information

	Three Months Ended
	December 31,
(in thousands)	2017		2016
Cash paid during the period for:
Income taxes, net	$	437	$	3,862
Interest	$	1,806	$	2,164

Commitments and Contingencies	3 Months Ended
Commitments and Contingencies	Dec. 31, 2017
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies	12) Commitments and Contingencies On April 18, 2017, a civil action was filed in the United States District Court for the Eastern District of New York, entitled M. Norman Donnenfeld v. Petro, Inc., Civil Action Number 2:17-cv-2310-JFB-SIL, against Petro, Inc. By amended complaint filed on August 15, 2017, the Plaintiff alleges he did not receive expected contractual benefits under his protected price plan contract when oil prices fell and asserts various claims for relief including breach of contract, violation of the New York General Business Law and fraud. The Plaintiff also seeks to have a class certified of similarly situated Petro customers who entered into protected price plan contracts and were denied the same contractual benefits. No class has yet been certified in this action. The Plaintiff seeks compensatory, punitive and other damages in unspecified amounts. On September 15, 2017, Petro filed a motion to dismiss the amended complaint as time-barred and for failure to state a cause of action. The motion was argued on January 18, 2018 and a decision is awaited. The Company believes the allegations lack merit and intends to vigorously defend the action; at this time we cannot assess the potential outcome or materiality of this matter. The Company’s operations are subject to the operating hazards and risks normally incidental to handling, storing and transporting and otherwise providing for use by consumers hazardous liquids such as home heating oil and propane. In the ordinary course of business, the Company is a defendant in various legal proceedings and litigation. The Company records a liability when it is probable that a loss has been incurred and the amount is reasonably estimable. We do not believe these matters, when considered individually or in the aggregate, could reasonably be expected to have a material adverse effect on the Company’s results of operations, financial position or liquidity. The Company maintains insurance policies with insurers in amounts and with coverages and deductibles we believe are reasonable and prudent. However, the Company cannot assure that this insurance will be adequate to protect it from all material expenses related to current and potential future claims, legal proceedings and litigation, including the above mentioned action, as certain types of claims may be excluded from our insurance coverage. If we incur substantial liability and the damages are not covered by insurance, or are in excess of policy limits, or if we incur liability at a time when we are not able to obtain liability insurance, then our business, results of operations and financial condition could be materially adversely affected.

Earnings Per Limited Partner Unit

3 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Earnings Per Limited Partner Unit

13) Earnings Per Limited Partner Unit

Income per limited partner unit is computed in accordance with FASB ASC 260-10-05 Earnings Per Share, Master Limited Partnerships (EITF 03-06), by dividing the limited partners’ interest in net income by the weighted average number of limited partner units outstanding. The pro forma nature of the allocation required by this standard provides that in any accounting period where the Company’s aggregate net income exceeds its aggregate distribution for such period, the Company is required to present net income per limited partner unit as if all of the earnings for the periods were distributed, regardless of whether those earnings would actually be distributed during a particular period from an economic or practical perspective. This allocation does not impact the Company’s overall net income or other financial results. However, for periods in which the Company’s aggregate net income exceeds its aggregate distributions for such period, it will have the impact of reducing the earnings per limited partner unit, as the calculation according to this standard result in a theoretical increased allocation of undistributed earnings to the general partner. In accounting periods where aggregate net income does not exceed aggregate distributions for such period, this standard does not have any impact on the Company’s net income per limited partner unit calculation. A separate and independent calculation for each quarter and year-to-date period is performed, in which the Company’s contractual participation rights are taken into account.

The following presents the net income allocation and per unit data using this method for the periods presented:

	Three Months Ended
Basic and Diluted Earnings Per Limited Partner:	December 31,
(in thousands, except per unit data)	2017		2016
Net income	$	30,182	$	18,275
Less General Partner’s interest in net income		175		105
Net income available to limited partners		30,007		18,170
Less dilutive impact of theoretical distribution of earnings under FASB ASC 260-10-45-60		4,740		2,446
Limited Partner’s interest in net income under FASB ASC 260-10-45-60	$	25,267	$	15,724
Per unit data:
Basic and diluted net income available to limited partners	$	0.53	$	0.33
Less dilutive impact of theoretical distribution of earnings under FASB ASC 260-10-45-60		0.08		0.05
Limited Partner’s interest in net income under FASB ASC 260-10-45-60	$	0.45	$	0.28
Weighted average number of Limited Partner units outstanding		55,887		55,887

Subsequent Events	3 Months Ended
Subsequent Events	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Events	14) Subsequent Events Quarterly Distribution Declared In January 2018, we declared a quarterly distribution of $0.11 per unit, or $0.44 per unit on an annualized basis, on all Common Units with respect to the first quarter of fiscal 2018, payable on February 6, 2018, to holders of record on January 29, 2018. In accordance with our Partnership Agreement, the amount of distributions in excess of the minimum quarterly distribution of $0.0675, are distributed 90% to Common Unit holders and 10% to the General Partner unit holders (until certain distribution levels are met), subject to the management incentive compensation plan. As a result, $6.1 million will be paid to the Common Unit holders, $0.2 million to the General Partner unit holders (including $0.1 million of incentive distribution as provided in our Partnership Agreement) and $0.1 million to management pursuant to the management incentive compensation plan which provides for certain members of management to receive incentive distributions that would otherwise be payable to the General Partner.

Summary of Significant Accounting Policies (Policies)	3 Months Ended
Summary of Significant Accounting Policies (Policies)	Dec. 31, 2017
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The Consolidated Financial Statements include the accounts of Star Group, L.P. and its subsidiaries. All material intercompany items and transactions have been eliminated in consolidation. The financial information included herein is unaudited; however, such information reflects all adjustments (consisting solely of normal recurring adjustments), which are, in the opinion of management, necessary for the fair statement of financial condition and results for the interim periods. Due to the seasonal nature of the Company’s business, the results of operations and cash flows for the three month period ended December 31, 2017 are not necessarily indicative of the results to be expected for the full year. These interim financial statements of the Company have been prepared in accordance with U.S. Generally Accepted Accounting Principles (“GAAP”) for interim financial information and Rule 10-01 of Regulation S-X of the U.S. Securities and Exchange Commission and should be read in conjunction with the financial statements included in the Company’s Annual Report on Form 10-K for the year ended September 30, 2017.
Comprehensive Income	Comprehensive Income Comprehensive income is comprised of Net income and Other comprehensive income. Other comprehensive income consists of the unrealized gain amortization on the Company’s pension plan obligation for its two frozen defined benefit pension plans, and the corresponding tax effect.
Cash, Cash Equivalents, and Restricted Cash	Cash, Cash Equivalents, and Restricted Cash The Company considers all highly liquid investments with an original maturity of three months or less, when purchased, to be cash equivalents. At December 31, 2017, the $21.4 million of cash, cash equivalents, and restricted cash on the condensed consolidated statement of cash flows is composed of $21.1 million of cash and cash equivalents and $0.3 million of restricted cash. At September 30, 2017, the $52.7 million of cash, cash equivalents, and restricted cash on the condensed consolidated statements of cash flow is composed of $52.5 million of cash and cash equivalents and $0.3 million of restricted cash. Restricted cash represents deposits held by our captive insurance company that are required by state insurance regulations to remain in the captive insurance company as cash.
Captive Insurance Collateral	Captive Insurance Collateral At December 31, 2017 captive insurance collateral is comprised of $45.1 million of Level 1 debt securities measured at fair value and $0.7 million of mutual funds measured at net asset value. At September 30, 2017 the balance was comprised of $11.3 million of Level 1 debt securities measured at fair value and $0.5 million of mutual funds measured at net asset value. The investments are held by our captive insurance company in an irrevocable trust as collateral for certain workers’ compensation, general and automobile liability claims. The collateral is required by a third party insurance carrier that insures per claim amounts above a set deductible. Due to the expected timing of claim payments, the nature of the collateral agreement with the carrier, and our captive insurance company’s source of other operating cash, the collateral is not expected to be used to pay obligations within the next twelve months. At September 30, 2017 the investments were held for workers’ compensation, general and automobile liability claims incurred and expected to be incurred in fiscal 2017. In the first quarter of fiscal 2018 we deposited $34.2 million of cash into the irrevocable trust to secure certain workers’ compensation, general and automobile liability claims incurred and expected to be incurred from fiscal 2004 to fiscal 2016 and fiscal 2018.
Weather Hedge Contract	Weather Hedge Contract To partially mitigate the adverse effect of warm weather on cash flows, the Company has used weather hedge contracts for a number of years. Weather hedge contracts are recorded in accordance with the intrinsic value method defined by the Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 815-45-15 Derivatives and Hedging, Weather Derivatives (EITF 99-2). The premium paid is included in the caption Prepaid expenses and other current assets in the accompanying balance sheets and amortized over the life of the contract, with the intrinsic value method applied at each interim period. The Company has weather hedge contracts for fiscal years 2017, 2018 and 2019. Under these contracts, we are entitled to receive a payment if the total number of degree days within the hedge period is less than the ten year average. The “Payment Thresholds,” or strikes, are set at various levels. In addition, we will be obligated to make a payment capped at $5.0 million if degree days exceed the ten year average. The hedge period runs from November 1 through March 31, taken as a whole, for each respective fiscal year. For fiscal 2018 the maximum that the Company can receive is $17.5 million and the maximum that the Company would be obligated to pay is $5.0 million. For fiscal 2019 the maximum that the Company can receive is $12.5 million and the maximum that the Company would be obligated to pay is $5.0 million. In accordance with ASC 815-45-15, as of December 31, 2017, the Company recorded a charge of $3.1 million under this contract that increased delivery and branch expenses. No credit was recorded as of December 31, 2016.
New England Teamsters and Trucking Industry Pension Fund ("the NETTI Fund") Liability	New England Teamsters and Trucking Industry Pension Fund (“the NETTI Fund”) Liability As of December 31, 2017, we had $0.2 million and $17.3 million balances included in the captions Accrued expenses and other current liabilities and Other long-term liabilities, respectively, on our condensed consolidated balance sheet representing the remaining balance of the NETTI withdrawal liability. Based on the borrowing rates currently available to the Company for long-term financing of a similar maturity, the fair value of the NETTI withdrawal liability as of December 31, 2017 was $22.3 million. We utilized Level 2 inputs in the fair value hierarchy of valuation techniques to determine the fair value of this liability.
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements In July 2015, the FASB issued ASU No. 2015-11, Simplifying the Measurement of Inventory. The update changes the measurement principle for inventory from the lower of cost or market to the lower of cost and net realizable value. The Company adopted the ASU effective December 31, 2017. The adoption of ASU No. 2015-11 did not have an impact on the Company’s consolidated financial statements and related disclosures.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, Revenue from Contracts with Customers, which requires an entity to recognize the amount of revenue to which it expects to be entitled for the transfer of promised goods or services to customers. The FASB has also issued several updates to ASU 2014-09. This ASU will replace most existing revenue recognition guidance in GAAP when it becomes effective. This new guidance is effective for our annual reporting period beginning in the first quarter of fiscal 2019, with early adoption permitted beginning in the first quarter of fiscal 2018. The standard permits the use of either the retrospective or cumulative effect transition method. The Company is in the process of evaluating the effect that ASU 2014-09 will have on its revenue streams, consolidated financial statements and related disclosures. The Company has not yet selected a transition method, nor does it intend to early adopt. In February 2016, the FASB issued ASU No. 2016-02, Leases. The update requires all leases with a term greater than twelve months to be recognized on the balance sheet by calculating the discounted present value of such leases and accounting for them through a right-of-use asset and an offsetting lease liability, and the disclosure of key information pertaining to leasing arrangements. This new guidance is effective for our annual reporting period beginning in the first quarter of fiscal 2020, with early adoption permitted. The Company does not intend to early adopt. The Company is continuing to evaluate the effect that ASU No. 2016-02 could have on its consolidated financial statements and related disclosures, but has not yet selected a transition method. The new guidance will materially change how we account for operating leases for office space, trucks and other equipment. Upon adoption, we expect to recognize discounted right-of-use assets and offsetting lease liabilities related to our operating leases of office space, trucks and other equipment. As of December 31, 2017, the undiscounted future minimum lease payments through 2032 for such operating leases are approximately $131.1 million, but what amount of leasing activity is expected between December 31, 2017, and the date of adoption, is currently unknown. For this reason we are unable to estimate the discounted right-of-use assets and lease liabilities as of the date of adoption. In June 2016, the FASB issued ASU No. 2016-13, Financial Instruments – Credit Losses. The update broadens the information that an entity should consider in developing expected credit loss estimates, eliminates the probable initial recognition threshold, and allows for the immediate recognition of the full amount of expected credit losses. This new guidance is effective for our annual reporting period beginning in the first quarter of fiscal 2021, with early adoption permitted in the first quarter of fiscal 2020. The Company is evaluating the effect that ASU No. 2016-13 will have on its consolidated financial statements and related disclosures, but has not yet determined the timing of adoption. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flow (Topic 230): Classification of Certain Cash Receipts and Cash Payments. The update addresses the issues of debt prepayment or debt extinguishment costs, settlement of zero-coupon debt instruments or other debt instruments with coupon interest rates that are insignificant in relation to the effective interest rate of the borrowing, contingent consideration payments made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate owned life insurance policies, distributions received from equity method investees, beneficial interests in securitization transactions, and separately identifiable cash flows and application of the predominance principle. This new guidance is effective for our annual reporting period beginning in the first quarter of fiscal 2019, with early adoption permitted. The Company has not determined the timing of adoption, but does not expect ASU 2016-15 to have a material impact on its consolidated financial statements and related disclosures. In January 2017, the FASB issued ASU No. 2017-01, Business Combinations (Topic 805): Clarifying the definition of a business. The update clarifies the definition of a business with the objective of adding guidance to assist entities with evaluating whether transactions should be accounted for as acquisitions (or disposals) of assets or businesses. This new guidance is effective for our annual reporting period beginning in the first quarter of fiscal 2019, with early adoption permitted. The Company has not determined the timing of adoption, but does not expect ASU 2017-01 to have a material impact on its consolidated financial statements and related disclosures. In January 2017, the FASB issued ASU No. 2017-04, Intangibles – Goodwill and Other (Topic 230): Simplifying the test for goodwill impairment. The update simplifies how an entity is required to test goodwill for impairment. An entity should recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit’s fair value, but not exceed the total amount of goodwill allocated to the reporting unit. This new guidance is effective for our annual reporting period beginning in the first quarter of fiscal 2021, with early adoption permitted. The Company has not determined the timing of adoption, but does not expect ASU 2017-04 to have a material impact on its consolidated financial statements and related disclosures.

Disclosure of accounting policy for investments in financial assets, including marketable securities (debt and equity securities with readily determinable fair values), investments accounted for under the equity method and cost method, securities borrowed and loaned, and repurchase and resale agreements. For marketable securities, the disclosure may include the entity's accounting treatment for transfers between investment categories and how the fair values for such securities are determined. Also, for all investments, an entity may describe its policy for assessing, recognizing and measuring impairment of the investment.

+ References + Details

Company's Repurchase Activities

Disclosure of accounting policy for pension and other postretirement benefit plans. This accounting policy may address (1) the types of plans sponsored by the entity, and the benefits provided by each plan (2) groups that participate in (or are covered by) each plan (3) how plan assets, liabilities and expenses are measured, including the use of any actuaries and (4) significant assumptions used by the entity to value plan assets and liabilities and how such assumptions are derived.

+ References + Details

Common Unit Repurchase Plans and Retirement (Tables)

3 Months Ended

Dec. 31, 2017

Equity [Abstract]

The following table shows repurchases under Plan III.

(in thousands, except per unit amounts) Period	Total Number of Units Purchased (a)		Average Price Paid per Unit (b)		Maximum Number of Units that May Yet Be Purchased
Plan III - Number of units authorized						4,894
Private transaction - Number of units authorized						2,450
						7,344
Plan III - Fiscal years 2012 to 2017 total (c)		5,137	$	5.78		2,207

Plan III - First quarter fiscal year 2018 total		-	$	-		2,207

(a)	Units were repurchased as part of a publicly announced program, except as noted in a private transaction.

(b)	Amounts include repurchase costs.

(c)	Includes 2.45 million common units acquired in a private transaction.

Derivatives and Hedging-Disclosures and Fair Value Measurements (Tables)

3 Months Ended

Dec. 31, 2017

Derivative Instruments And Hedging Activities Disclosure [Abstract]

Company's Financial Assets and Liabilities Measured at Fair Value on Recurring Basis

The Company’s financial assets and liabilities measured at fair value on a recurring basis are listed on the following table.

(In thousands)					Fair Value Measurements at Reporting Date Using:
Derivatives Not Designated as Hedging Instruments					Quoted Prices in Active Markets for Identical Assets		Significant Other Observable Inputs
Under FASB ASC 815-10	Balance Sheet Location	Total			Level 1		Level 2
Asset Derivatives at December 31, 2017
Commodity contracts	Fair asset and fair liability value of derivative instruments	$	19,220		$	-	$	19,220
Commodity contracts	Long-term derivative assets included in the deferred charges and other assets, net balance		755		$	-		755
Commodity contract assets at December 31, 2017		$	19,975		$	-	$	19,975
Liability Derivatives at December 31, 2017
Commodity contracts	Fair liability and fair asset value of derivative instruments	$	-		$	-	$	-
Commodity contracts	Long-term derivative liabilities included in the deferred charges and other assets, net balance		(6	)				(6	)
Commodity contract liabilities at December 31, 2017		$	(6	)	$	-	$	(6	)
Asset Derivatives at September 30, 2017
Commodity contracts	Fair asset and fair liability value of derivative instruments	$	7,729		$	-	$	7,729
Commodity contracts	Long-term derivative assets included in the deferred charges and other assets, net balance		996			-		996
Commodity contract assets at September 30, 2017		$	8,725		$	-	$	8,725
Liability Derivatives at September 30, 2017
Commodity contracts	Fair liability and fair asset value of derivative instruments	$	(2,086	)	$	-	$	(2,086	)
Commodity contracts	Long-term derivative liabilities included in the deferred charges and other assets, net and other long-term liabilities balances		(731	)		-		(731	)
Commodity contract liabilities at September 30, 2017		$	(2,817	)			$	(2,817	)

Company's Derivatives Assets (Liabilities) Offset by Counterparty

The Company’s derivative assets (liabilities) offset by counterparty and subject to an enforceable master netting arrangement are listed on the following table.

(In thousands)									Gross Amounts Not Offset in the Statement of Financial Position
Offsetting of Financial Assets (Liabilities) and Derivative Assets (Liabilities)	Gross Assets Recognized		Gross Liabilities Offset in the Statement of Financial Position			Net Assets (Liabilities) Presented in the Statement of Financial Position			Financial Instruments		Cash Collateral Received		Net Amount
Fair asset value of derivative instruments	$	19,220	$	-		$	19,220		$	-			$	19,220
Long-term derivative assets included in deferred charges and other assets, net		755		(6	)		749			-		-		749
Fair liability value of derivative instruments		-		-			-			-		-		-
Long-term derivative liabilities included in other long-term liabilities, net		-		-			-			-		-		-
Total at December 31, 2017	$	19,975	$	(6	)	$	19,969		$	-	$	-	$	19,969
Fair asset value of derivative instruments	$	6,023	$	(91	)	$	5,932		$	-	$	-	$	5,932
Long-term derivative assets included in other long-term assets, net		996		(730	)		266			-		-		266
Fair liability value of derivative instruments		1,706		(1,995	)		(289	)		-		-		(289	)
Long-term derivative liabilities included in other long-term liabilities, net		-		(1	)		(1	)		-		-		(1	)
Total at September 30, 2017	$	8,725	$	(2,817	)	$	5,908		$	-	$	-	$	5,908

Company's Derivatives Assets (Liabilities) Offset by Counterparty

The Company’s derivative assets (liabilities) offset by counterparty and subject to an enforceable master netting arrangement are listed on the following table.

(In thousands)									Gross Amounts Not Offset in the Statement of Financial Position
Offsetting of Financial Assets (Liabilities) and Derivative Assets (Liabilities)	Gross Assets Recognized		Gross Liabilities Offset in the Statement of Financial Position			Net Assets (Liabilities) Presented in the Statement of Financial Position			Financial Instruments		Cash Collateral Received		Net Amount
Fair asset value of derivative instruments	$	19,220	$	-		$	19,220		$	-			$	19,220
Long-term derivative assets included in deferred charges and other assets, net		755		(6	)		749			-		-		749
Fair liability value of derivative instruments		-		-			-			-		-		-
Long-term derivative liabilities included in other long-term liabilities, net		-		-			-			-		-		-
Total at December 31, 2017	$	19,975	$	(6	)	$	19,969		$	-	$	-	$	19,969
Fair asset value of derivative instruments	$	6,023	$	(91	)	$	5,932		$	-	$	-	$	5,932
Long-term derivative assets included in other long-term assets, net		996		(730	)		266			-		-		266
Fair liability value of derivative instruments		1,706		(1,995	)		(289	)		-		-		(289	)
Long-term derivative liabilities included in other long-term liabilities, net		-		(1	)		(1	)		-		-		(1	)
Total at September 30, 2017	$	8,725	$	(2,817	)	$	5,908		$	-	$	-	$	5,908

Company's Effect on Derivative Instruments on the Statement of Operations

(In thousands)
The Effect of Derivative Instruments on the Statement of Operations
		Amount of (Gain) or Loss Recognized
Derivatives Not Designated as Hedging Instruments Under FASB ASC 815-10	Location of (Gain) or Loss Recognized in Income on Derivative	Three Months Ended December 31, 2017			Three Months Ended December 31, 2016
Commodity contracts	Cost of product (a)	$	184		$	3,381
Commodity contracts	Cost of installations and service (a)	$	(582	)	$	(94	)
Commodity contracts	Delivery and branch expenses (a)	$	(1,229	)	$	(117	)
Commodity contracts	(Increase) / decrease in the fair value of derivative instruments (b)	$	(11,400	)	$	(8,551	)

(a)	Represents realized closed positions and includes the cost of options as they expire.

(b)	Represents the change in value of unrealized open positions and expired options.

Inventories (Tables)

3 Months Ended

Dec. 31, 2017

Inventory Disclosure [Abstract]

Components of Inventory

The components of inventory were as follows (in thousands):

	December 31, 2017		September 30, 2017
Product	$	49,842	$	37,941
Parts and equipment		21,662		21,655
Total inventory	$	71,504	$	59,596

Property and Equipment (Tables)

3 Months Ended

Dec. 31, 2017

Property Plant And Equipment [Abstract]

Property and Equipment

Property and equipment are stated at cost. Depreciation is computed over the estimated useful lives of the depreciable assets using the straight-line method (in thousands):

	December 31, 2017		September 30, 2017
Property and equipment	$	203,674	$	201,312
Less: accumulated depreciation		124,136		121,639
Property and equipment, net	$	79,538	$	79,673

Goodwill and Intangibles, net (Tables)

3 Months Ended

Dec. 31, 2017

Goodwill And Intangible Assets Disclosure [Abstract]

Summary of Changes in the Company's Goodwill

A summary of changes in the Company’s goodwill is as follows (in thousands):

Balance as of September 30, 2017	$	225,915
Fiscal year 2018 business combinations		63
Balance as of December 31, 2017	$	225,978

Intangible Assets Subject to Amortization

The gross carrying amount and accumulated amortization of intangible assets subject to amortization are as follows (in thousands):

	December 31, 2017						September 30, 2017
	Gross						Gross
	Carrying		Accum.				Carrying		Accum.
	Amount		Amortization		Net		Amount		Amortization		Net
Customer lists	$	346,995	$	268,362	$	78,633	$	346,784	$	264,632	$	82,152
Trade names and other intangibles		32,047		10,037		22,010		32,047		8,981		23,066
Total	$	379,042	$	278,399	$	100,643	$	378,831	$	273,613	$	105,218

Long-Term Debt and Bank Facility Borrowings (Tables)

3 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Company's Debt

The Company’s debt is as follows (in thousands):

	December 31,				September 30,
	2017				2017
	Carrying Amount		Fair Value (a)		Carrying Amount		Fair Value (a)
Revolving Credit Facility Borrowings	$	79,149	$	79,149	$	-	$	-
Senior Secured Term Loan (b)		73,278		73,800		75,717		76,300
Total debt	$	152,427	$	152,949	$	75,717	$	76,300
Total long-term portion of debt (b)	$	63,278	$	63,800	$	65,717	$	66,300

(a)	The face amount of the Company’s variable rate long-term debt approximates fair value.

(b)	Carrying amounts are net of unamortized debt issuance costs of $0.5 million as December 31, 2017 and $0.6 million as of September 30, 2017.

Current and Deferred Income Tax (Benefit) and Expenses

Tabular disclosure of long-debt instruments or arrangements, including identification, terms, features, collateral requirements and other information necessary to a fair presentation. These are debt arrangements that originally required repayment more than twelve months after issuance or greater than the normal operating cycle of the entity, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21475-112644

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=75038535&loc=d3e64711-112823

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(e),(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 6: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21538-112644

Reference 7: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21506-112644

Reference 8: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

Reference 9: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28551-108399

Reference 10: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 7
-URI http://asc.fasb.org/extlink&oid=84159872&loc=d3e21521-112644

+ Details

Income Taxes (Tables)

3 Months Ended

Dec. 31, 2017

Income Tax Disclosure [Abstract]

The current and deferred income tax (benefit) and expenses for the three months ended December 31, 2017, and 2016 are as follows:

	Three Months Ended
	December 31,
(in thousands)	2017			2016
Income before income taxes	$	28,670		$	31,138
Current tax expense		1,228			8,922

Deferred tax expense		8,712			3,941
Deferred tax benefit - impact of tax reform		(11,452	)		-
Total deferred tax (benefit) expense		(2,740	)		3,941
Total tax (benefit) expense	$	(1,512	)	$	12,863

Provision for Income Taxes Differs from Income Taxes

The provision for income taxes differs from income taxes computed at the Federal statutory rate as a result of the following (in thousands):

	Three Months Ended
	December 31,
(in thousands)	2017			2016
Income before income taxes	$	28,670		$	31,138

Tax at Federal statutory rate		7,024			10,898
Impact of Partnership loss not subject to federal income taxes		51			146
State taxes net of federal benefit		2,522			1,819
Deferred tax benefit - impact of tax reform		(11,452	)		-
Other		343			-
Total tax (benefit) expense	$	(1,512	)	$	12,863

Supplemental Disclosure of Cash Flow Information (Tables)

3 Months Ended

Dec. 31, 2017

Supplemental Cash Flow Elements [Abstract]

Supplemental Disclosure of Cash Flow Information

	Three Months Ended
	December 31,
(in thousands)	2017		2016
Cash paid during the period for:
Income taxes, net	$	437	$	3,862
Interest	$	1,806	$	2,164

Earnings Per Limited Partner Unit (Tables)

3 Months Ended

Dec. 31, 2017

Earnings Per Share [Abstract]

Net Income Allocation and Per Unit Data

The following presents the net income allocation and per unit data using this method for the periods presented:

	Three Months Ended
Basic and Diluted Earnings Per Limited Partner:	December 31,
(in thousands, except per unit data)	2017		2016
Net income	$	30,182	$	18,275
Less General Partner’s interest in net income		175		105
Net income available to limited partners		30,007		18,170
Less dilutive impact of theoretical distribution of earnings under FASB ASC 260-10-45-60		4,740		2,446
Limited Partner’s interest in net income under FASB ASC 260-10-45-60	$	25,267	$	15,724
Per unit data:
Basic and diluted net income available to limited partners	$	0.53	$	0.33
Less dilutive impact of theoretical distribution of earnings under FASB ASC 260-10-45-60		0.08		0.05
Limited Partner’s interest in net income under FASB ASC 260-10-45-60	$	0.45	$	0.28
Weighted average number of Limited Partner units outstanding		55,887		55,887

Organization - Additional Information (Detail) shares in Thousands		3 Months Ended
	Jul. 30, 2015 USD ($)	Dec. 31, 2017 Customer Contract shares	Sep. 30, 2017 shares
Limited Partners' Capital Account [Line Items]
Percentage of limited partner interest		99.40%
Percentage of general partner interest		0.60%
Third Amendment
Limited Partners' Capital Account [Line Items]
Non Seasonal maximum borrowing capacity under revolving credit facility \| $	$ 300,000,000
Maximum borrowing capacity (heating season December to April) under revolving credit facility \| $	$ 450,000,000
Due date of debt	Jul. 30, 2020
Third Amendment \| Term Loan
Limited Partners' Capital Account [Line Items]
Senior secured term loan maturity period	5 years
Star Acquisitions, Inc
Limited Partners' Capital Account [Line Items]
Ownership interest of partnership		100.00%
Petro Holdings, Inc
Limited Partners' Capital Account [Line Items]
Ownership interest of Star Acquisitions Inc.		100.00%
Number of full-service residential and commercial home heating oil and propane customers served		461,000
Number of customers to whom only home heating oil, gasoline and diesel fuel were sold on a delivery only basis		76,000
Number of service contracts for natural gas and other heating systems \| Contract		14,000
Number of customers to whom ancillary services were provided		31,000
Petroleum Heat and Power Co., Inc.
Limited Partners' Capital Account [Line Items]
Ownership interest of partnership		100.00%
Common Stock
Limited Partners' Capital Account [Line Items]
Number of outstanding units \| shares		55,887	55,887
General Partner
Limited Partners' Capital Account [Line Items]
Number of outstanding units \| shares		326	326

Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016
Schedule Of Significant Accounting Policies [Line Items]
Cash, cash equivalents, and restricted cash	$ 21,389,000			$ 52,708,000	$ 37,326,000	$ 139,188,000
Cash and cash equivalents	21,139,000			52,458,000
Restricted cash	250,000			250,000
Captive insurance collateral, debt securities	45,100,000			11,300,000
Cash deposit in support of liability	34,200,000
Accrued expenses and other current liabilities	119,681,000			108,449,000
Other long-term liabilities	$ 23,037,000			23,659,000
Operating lease expiration year	2032
Undiscounted future minimum lease payments through 2032	$ 131,100,000
New England Teamsters & Trucking Industry Pension Fund
Schedule Of Significant Accounting Policies [Line Items]
Accrued expenses and other current liabilities	200,000
Other long-term liabilities	17,300,000
New England Teamsters & Trucking Industry Pension Fund \| Significant Other Observable Inputs Level 2
Schedule Of Significant Accounting Policies [Line Items]
Multiemployer plan discounted withdrawal liability	22,300,000
Subsidiaries of Swiss Re
Schedule Of Significant Accounting Policies [Line Items]
Additional payment obligated to pay if degree days exceed ten year average	5,000,000
Subsidiaries of Swiss Re \| Scenario forecast
Schedule Of Significant Accounting Policies [Line Items]
Derivative maximum payout		$ 5,000,000	$ 5,000,000
Subsidiaries of Swiss Re \| Delivery and branch expenses
Schedule Of Significant Accounting Policies [Line Items]
Charge on weather hedge contract	3,100,000
Credit on weather hedge contract	0
Mutual Funds
Schedule Of Significant Accounting Policies [Line Items]
Captive insurance collateral, net asset value	$ 700,000			$ 500,000
Maximum
Schedule Of Significant Accounting Policies [Line Items]
Cash equivalents, highly liquid investments maturity	3 months
Maximum \| Subsidiaries of Swiss Re \| Scenario forecast
Schedule Of Significant Accounting Policies [Line Items]
Derivative maximum receivable		$ 12,500,000	$ 17,500,000

Common Unit Repurchase and Retirement - Additional Information (Detail) - USD ($) shares in Thousands	Jul. 30, 2015	Dec. 31, 2017	Jul. 31, 2013	Jul. 31, 2012
Capital Unit [Line Items]
Company's common units authorized for repurchase		7,344
Third Amendment
Capital Unit [Line Items]
Availability required to repurchase common units	$ 45,000,000
Percentage of the maximum facility size on a historical proforma and forward-looking basis	15.00%
Non Seasonal maximum borrowing capacity under revolving credit facility	$ 300,000,000
Minimum fixed charge coverage ratio for distributions to unit holders or to repurchase common units	115.00%
Initial Common Units Authorized Plan III Common Units Repurchase Program
Capital Unit [Line Items]
Company's common units authorized for repurchase				3,000
Additional Common Units Authorized Plan III Common Units Repurchase Program
Capital Unit [Line Items]
Company's common units authorized for repurchase			1,900

Company's Repurchase Activities (Detail) - $ / shares
shares in Thousands

72 Months Ended

Sep. 30, 2017

Dec. 31, 2017

Capital Unit [Line Items]

Company's common units authorized for repurchase

7,344

Plan III Common Units Repurchase Program

Capital Unit [Line Items]

Company's common units authorized for repurchase

4,894

Total Number of Units Purchased

^[1],[2]

5,137

Average Price Paid per Unit

^[1],[3]

$ 5.78

Maximum Number of Units that May Yet Be Purchased

2,207

^[1]

2,207

Private Transaction

Capital Unit [Line Items]

Company's common units authorized for repurchase

2,450

[1]	Includes 2.45 million common units acquired in a private transaction.
[2]	Units were repurchased as part of a publicly announced program, except as noted in a private transaction.
[3]	Amounts include repurchase costs.

Company's Repurchase Activities (Parenthetical) (Detail) - shares shares in Thousands	Dec. 31, 2017	Sep. 30, 2017
Capital Unit [Line Items]
Company's common units authorized for repurchase	7,344
Private Transaction
Capital Unit [Line Items]
Company's common units authorized for repurchase	2,450	2,450

Derivatives and Hedging-Disclosures and Fair Value Measurements - Additional Information (Detail) gal in Millions	3 Months Ended
	Dec. 31, 2017 USD ($) gal	Dec. 31, 2016 gal	Sep. 30, 2017 USD ($)
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative activity volume		5.1
Hedging positions and payable amounts secured under credit facility \| $	$ 0		$ 100,000
Prepaid expense and other current assets
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Aggregated cash posted as collateral in normal course of business \| $	$ 1,500,000
Call Option
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative activity volume	7.3	7.6
Call Option \| Synthetic calls
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative activity volume	83.9	89.2
Put Option
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative activity volume	8.7	9.0
Swap Contracts Bought
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative activity volume	17.9	14.0
Future Contracts \| Long
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative activity volume	27.8	23.5
Future Contracts \| Short
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative activity volume	55.1	44.7
Hedge its Internal Fuel Usage and Other Related Activities Swap Contracts Bought
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative activity volume	2.3	4.2
Long Swap Contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative activity volume		1.0

Company's Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) - Fair Value, Measurements, Recurring - Derivatives Not Designated as Hedging Instruments under FASB ASC 815-10 - Commodity Contract - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, commodity contracts	$ 19,975	$ 8,725
Derivative Liabilities, commodity contracts	(6)	(2,817)
Fair asset and fair liability value of derivative instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, commodity contracts	19,220	7,729
Deferred charges and other assets, net balance
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, commodity contracts	755	996
Derivative Liabilities, commodity contracts	(6)
Fair liability and fair asset value of derivative instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities, commodity contracts		(2,086)
Deferred charges and other assets, net and other long-term liabilities balances
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities, commodity contracts		(731)
Significant Other Observable Inputs Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, commodity contracts	19,975	8,725
Derivative Liabilities, commodity contracts	(6)	(2,817)
Significant Other Observable Inputs Level 2 \| Fair asset and fair liability value of derivative instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, commodity contracts	19,220	7,729
Significant Other Observable Inputs Level 2 \| Deferred charges and other assets, net balance
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Assets, commodity contracts	755	996
Derivative Liabilities, commodity contracts	$ (6)
Significant Other Observable Inputs Level 2 \| Fair liability and fair asset value of derivative instruments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities, commodity contracts		(2,086)
Significant Other Observable Inputs Level 2 \| Deferred charges and other assets, net and other long-term liabilities balances
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivative Liabilities, commodity contracts		$ (731)

Offsetting of Financial Assets (Liabilities) and Derivative Assets (Liabilities) (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Net Assets (Liabilities) Presented in the Statement of Financial Position	$ 19,220	$ 5,932
Net Assets (Liabilities) Presented in the Statement of Financial Position		(289)
Subject to an enforceable master netting arrangement
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Gross Assets Recognized	19,975	8,725
Gross Liabilities Offset in the Statement of Financial Position	(6)	(2,817)
Net Assets (Liabilities) Presented in the Statement of Financial Position	19,969	5,908
Financial Instruments		0
Cash Collateral Received		0
Net Amount	19,969	5,908
Subject to an enforceable master netting arrangement \| Fair asset and fair liability value of derivative instruments
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Gross Assets Recognized	19,220	6,023
Gross Liabilities Offset in the Statement of Financial Position		(91)
Net Assets (Liabilities) Presented in the Statement of Financial Position	19,220	5,932
Financial Instruments		0
Cash Collateral Received		0
Net Amount	19,220	5,932
Subject to an enforceable master netting arrangement \| Deferred charges and other assets, net
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Gross Assets Recognized	755
Gross Liabilities Offset in the Statement of Financial Position	(6)
Net Assets (Liabilities) Presented in the Statement of Financial Position	749
Net Amount	$ 749
Subject to an enforceable master netting arrangement \| Other long-term assets, net
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Gross Assets Recognized		996
Gross Liabilities Offset in the Statement of Financial Position		(730)
Net Assets (Liabilities) Presented in the Statement of Financial Position		266
Financial Instruments		0
Cash Collateral Received		0
Net Amount		266
Subject to an enforceable master netting arrangement \| Fair liability and fair asset value of derivative instruments
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Gross Assets Recognized		1,706
Gross Liabilities Offset in the Statement of Financial Position		(1,995)
Net Assets (Liabilities) Presented in the Statement of Financial Position		(289)
Financial Instruments		0
Cash Collateral Received		0
Net Amount		(289)
Subject to an enforceable master netting arrangement \| Other long-term liabilities
Fair Values Of Financial Assets And Liabilities Including Derivative Financial Instruments [Line Items]
Gross Liabilities Offset in the Statement of Financial Position		(1)
Net Assets (Liabilities) Presented in the Statement of Financial Position		(1)
Financial Instruments		0
Cash Collateral Received		0
Net Amount		$ (1)

Effect of Derivative Instruments on Statement of Operations (Detail) - USD ($)
$ in Thousands

3 Months Ended

Dec. 31, 2017

Dec. 31, 2016

Derivative Instruments, Gain (Loss) [Line Items]

Amount of (Gain) or Loss Unrealized, commodity contracts

^[1]

$ (11,400)

$ (8,551)

Fair Value, Measurements, Recurring | Derivatives Not Designated as Hedging Instruments under FASB ASC 815-10 | Commodity Contract | Cost of product

Derivative Instruments, Gain (Loss) [Line Items]

Amount of (Gain) or Loss Recognized, commodity contracts

^[2]

184

3,381

Fair Value, Measurements, Recurring | Derivatives Not Designated as Hedging Instruments under FASB ASC 815-10 | Commodity Contract | Cost of installations and service

Derivative Instruments, Gain (Loss) [Line Items]

Amount of (Gain) or Loss Recognized, commodity contracts

^[2]

(582)

(94)

Fair Value, Measurements, Recurring | Derivatives Not Designated as Hedging Instruments under FASB ASC 815-10 | Commodity Contract | Delivery and branch expenses

Derivative Instruments, Gain (Loss) [Line Items]

Amount of (Gain) or Loss Recognized, commodity contracts

^[2]

$ (1,229)

$ (117)

[1]	Represents the change in value of unrealized open positions and expired options.
[2]	Represents realized closed positions and includes the cost of options as they expire.

Components of Inventory (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017
Inventory Disclosure [Abstract]
Product	$ 49,842	$ 37,941
Parts and equipment	21,662	21,655
Total inventory	$ 71,504	$ 59,596

Component of Property and Equipment (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017
Property Plant And Equipment [Abstract]
Property and equipment	$ 203,674	$ 201,312
Less: accumulated depreciation	124,136	121,639
Property and equipment, net	$ 79,538	$ 79,673

Business Combinations - Additional Information (Detail) $ in Millions	3 Months Ended
	Dec. 31, 2017 USD ($) PartnershipUnit
Business Acquisition [Line Items]
Number of dealers acquired \| PartnershipUnit	2
Heating Oil Dealer
Business Acquisition [Line Items]
Aggregate purchase price partnership acquired \| $	$ 0.3

Summary of Changes in the Company's Goodwill (Detail) $ in Thousands	3 Months Ended
	Dec. 31, 2017 USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]
Balance on beginning	$ 225,915
Fiscal year business combinations	63
Balance on ending	$ 225,978

Intangible Assets Subject to Amortization (Detail) - USD ($) $ in Thousands	Dec. 31, 2017	Sep. 30, 2017
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 379,042	$ 378,831
Accum. Amortization	278,399	273,613
Net	100,643	105,218
Customer Lists
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	346,995	346,784
Accum. Amortization	268,362	264,632
Net	78,633	82,152
Trade Names And Other Intangibles
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	32,047	32,047
Accum. Amortization	10,037	8,981
Net	$ 22,010	$ 23,066

Goodwill and Intangibles, net - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]
Amortization expense for intangible assets	$ 4.7	$ 3.9

Company's Debt (Detail) - USD ($)
$ in Thousands

Dec. 31, 2017

Sep. 30, 2017

Long-term debt, carrying Amount

$ 152,427

$ 75,717

Long-term debt

^[1]

63,278

65,717

Long-term portion of debt, fair value

^[2]

152,949

76,300

^[1],[2]

63,800

66,300

Revolving Credit Facility

Long-term debt, carrying Amount

79,149

^[2]

79,149

Term Loan

Long-term debt, carrying Amount

^[1]

73,278

75,717

^[1],[2]

$ 73,800

$ 76,300

[1]	Carrying amounts are net of unamortized debt issuance costs of $0.5 million as December 31, 2017 and $0.6 million as of September 30, 2017.
[2]	The face amount of the Company’s variable rate long-term debt approximates fair value.

Company's Debt (Parenthetical) (Detail) - USD ($) $ in Millions	Dec. 31, 2017	Sep. 30, 2017
Term Loan
Debt Instrument [Line Items]
Unamortized debt issuance costs	$ 0.5	$ 0.6

Long-Term Debt and Bank Facility Borrowings - Additional Information (Detail) - USD ($)

Jul. 30, 2015

Dec. 31, 2017

Sep. 30, 2017

Hedging positions and payable amounts secured under credit facility

$ 0

$ 100,000

Letters of credit issued and outstanding

7,300,000

48,000,000

Availability in compliance with the fixed charge coverage ratio

^[1]

152,949,000

76,300,000

$ 185,800,000

166,100,000

Third Amendment

Non Seasonal maximum borrowing capacity under revolving credit facility

$ 300,000,000

Maximum borrowing capacity (heating season December to April) under revolving credit facility

450,000,000

Issuance of line of credit for working capital purposes

$ 100,000,000

Revolving credit facility expiry

Jul. 30, 2020

Additional revolving credit

$ 100,000,000

Facility size that can be increased without consulting bank group

$ 100,000,000

Term loan annual payment percentage

25.00%

Debt instrument, effective interest rate

4.30%

Commitment fee on the unused portion of the facility from December through April

0.30%

Commitment fee on the unused portion of the facility from May through November

0.20%

Minimum fixed charge coverage ratio

110.00%

Availability percentage to maximum facility size

12.50%

Third Amendment | Maximum

Senior secured leverage ratio during quarters ending June or September

300.00%

Senior secured leverage ratio during quarters ending December or March

450.00%

Third Amendment | Quarterly

Term loan periodic payment

$ 2,500,000

Third Amendment | Annually | Maximum

Term loan periodic payment

15,000,000

Term Loan

Term Loan | Third Amendment

^[1],[2]

$ 73,800,000

76,300,000

Senior secured term loan maturity period

Outstanding senior notes

$ 100,000,000

5 years

Revolving Credit Facility

Revolving credit facility outstanding

^[1]

79,149,000

$ 79,100,000

$ 0

Revolving Credit Facility | Third Amendment

Debt instrument, effective interest rate

4.50%

[1]	The face amount of the Company’s variable rate long-term debt approximates fair value.
[2]	Carrying amounts are net of unamortized debt issuance costs of $0.5 million as December 31, 2017 and $0.6 million as of September 30, 2017.

Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Line Items]
Effective tax rate	(5.30%)	41.30%
Provisional income tax benefit due to reduction in Federal corporate tax rate	$ 11,452,000
Effective income tax rate excluding impact of net deferred tax liability	34.70%
Unrecognized income tax benefits	$ 0
Federal
Income Tax Disclosure [Abstract]
Number of years for examination	4 years
Federal \| Tax Year 2017
Income Tax Disclosure [Line Items]
Corporate income tax rate	35.00%
Federal \| Tax Year 2018
Income Tax Disclosure [Line Items]
Corporate income tax rate	21.00%
New York
Income Tax Disclosure [Abstract]
Number of years for examination	4 years
Connecticut
Income Tax Disclosure [Abstract]
Number of years for examination	4 years
Pennsylvania
Income Tax Disclosure [Abstract]
Number of years for examination	4 years
New Jersey
Income Tax Disclosure [Abstract]
Number of years for examination	5 years

Current and Deferred Income Tax (Benefit) and Expenses (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Deferred Income Tax Assets And Liabilities
Income before income taxes	$ 28,670	$ 31,138
Current tax expense	1,228	8,922
Deferred tax expense	8,712	3,941
Deferred tax benefit - impact of tax reform	(11,452)
Total deferred tax (benefit) expense	(2,740)	3,941
Total tax (benefit) expense	$ (1,512)	$ 12,863

Income Taxes Computed at Federal Statutory Rate (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Income Tax Disclosure [Abstract]
Income before income taxes	$ 28,670	$ 31,138
Tax at Federal statutory rate	7,024	10,898
Impact of Partnership loss not subject to federal income taxes	51	146
State taxes net of federal benefit	2,522	1,819
Deferred tax benefit - impact of tax reform	(11,452)
Other	343
Total tax (benefit) expense	$ (1,512)	$ 12,863

Supplemental Disclosure of Cash Flow Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Cash paid during the period for:
Income taxes, net	$ 437	$ 3,862
Interest	$ 1,806	$ 2,164

Net Income Allocation and Per Unit Data (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands

3 Months Ended

Dec. 31, 2017

Dec. 31, 2016

Basic and Diluted Earnings Per Limited Partner: