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

12 Months Ended

Sep. 30, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

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

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 commodity 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 September 30, 2022
Commodity contracts	Fair asset and liability value of derivative instruments	$	51,134		$	—	$	51,134
Commodity contracts	Long-term derivative assets included in the deferred charges and other assets, net		2,094			—		2,094
Commodity contract assets at September 30, 2022		$	53,228		$	—	$	53,228
Liability Derivatives at September 30, 2022
Commodity contracts	Fair asset and liability value of derivative instruments	$	(34,494	)	$	—	$	(34,494	)
Commodity contracts	Long-term derivative assets included in the deferred charges and other assets, net		(743	)		—		(743	)
Commodity contract liabilities at September 30, 2022		$	(35,237	)	$	—	$	(35,237	)
Asset Derivatives at September 30, 2021
Commodity contracts	Fair asset value of derivative instruments	$	29,360		$	—	$	29,360
Commodity contracts	Long-term derivative liabilities included in the deferred charges and other assets, net		2,023			—		2,023
Commodity contract assets at September 30, 2021		$	31,383		$	—	$	31,383
Liability Derivatives at September 30, 2021
Commodity contracts	Fair asset value of derivative instruments	$	(3,138	)	$	—	$	(3,138	)
Commodity contracts	Long-term derivative liabilities included in the deferred charges and other assets, net		(463	)		—		(463	)
Commodity contract liabilities at September 30, 2021		$	(3,601	)	$	—	$	(3,601	)

Company's Commodity Derivatives Assets (Liabilities) Offset by Counterparty

The Company’s commodity 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	$	47,784	$	(30,961	)	$	16,823		$	—	$	—	$	16,823
Long-term derivative assets included in    deferred charges and other assets, net		2,094		(743	)		1,351			—		—		1,351
Fair liability value of derivative instruments		3,350		(3,533	)		(183	)		—		—		(183	)
Total at September 30, 2022	$	53,228	$	(35,237	)	$	17,991		$	—	$	—	$	17,991
Fair asset value of derivative instruments	$	29,360	$	(3,138	)	$	26,222		$	—	$	—	$	26,222
Long-term derivative assets included in deferred charges and other assets, net		2,023		(463	)		1,560			—		—		1,560
Total at September 30, 2021	$	31,383	$	(3,601	)	$	27,782		$	—	$	—	$	27,782

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
		Years Ended September 30,
Derivatives Not Designated as Hedging Instruments Under FASB ASC 815-10	Location of (Gain) or Loss Recognized in Income on Derivative	2022			2021			2020
Commodity contracts	Cost of product (a)	$	(34,523	)	$	2,395		$	10,462
Commodity contracts	Cost of installations and service (a)	$	(1,555	)	$	(359	)	$	607
Commodity contracts	Delivery and branch expenses (a)	$	(3,423	)	$	183		$	1,634
Commodity contracts	(Increase) / decrease in the fair value of derivative instruments (b)	$	17,286		$	(36,138	)	$	2,755

(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.