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Derivatives and Hedging-Disclosures and Fair Value Measurements (Tables) | 6 Months Ended
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Mar. 31, 2022
Derivative Instruments And Hedging Activities Disclosure [Abstract] |
Company's Commodity Financial Assets and Liabilities Measured at Fair Value on Recurring Basis | 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 March 31, 2022 |
Commodity contracts |  | Fair asset value of derivative instruments |  | $ | 38,503 |  |  | $ | — |  |  | $ | 38,503 |
Commodity contracts |  | Long-term derivative assets included in the deferred charges and other assets, net |  |  | 1,929 |  |  |  | — |  |  |  | 1,929 |
Commodity contract assets at March 31, 2022 |  | $ | 40,432 |  |  | $ | — |  |  | $ | 40,432 |
Liability Derivatives at March 31, 2022 |
Commodity contracts |  | Fair asset value of derivative instruments |  | $ | (726 | ) |  | $ | — |  |  | $ | (726 | )
Commodity contracts |  | Long-term derivative assets included in the deferred charges and other assets, net |  |  | — |  |  |  | — |  |  |  | — |
Commodity contract liabilities at March 31, 2022 |  | $ | (726 | ) |  | $ | — |  |  | $ | (726 | )
Asset Derivatives at September 30, 2021 |
Commodity contracts |  | Fair asset value of derivative instruments |  | $ | 29,360 |  |  | $ | — |  |  | $ | 29,360 |
Commodity contracts |  | Long-term derivative assets included in the deferred charges and other assets, net |  |  | 2,023 |  |  |  | — |  |  |  | 2,023 |
Commodity contract assets 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 assets included in the deferred charges and other assets, net |  |  | (463 | ) |  |  | — |  |  |  | (463 | )
Commodity contract liabilities 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 |  | $ | 38,503 |  |  | $ | (726 | ) |  | $ | 37,777 |  |  | $ | — |  |  | $ | — |  |  | $ | 37,777 |
Long-term derivative assets included in deferred charges and other assets, net |  |  | 1,929 |  |  |  | — |  |  |  | 1,929 |  |  |  | — |  |  |  | — |  |  |  | 1,929 |
Total at March 31, 2022 |  | $ | 40,432 |  |  | $ | (726 | ) |  | $ | 39,706 |  |  | $ | — |  |  | $ | — |  |  | $ | 39,706 |
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 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 |  | $ | 38,503 |  |  | $ | (726 | ) |  | $ | 37,777 |  |  | $ | — |  |  | $ | — |  |  | $ | 37,777 |
Long-term derivative assets included in deferred charges and other assets, net |  |  | 1,929 |  |  |  | — |  |  |  | 1,929 |  |  |  | — |  |  |  | — |  |  |  | 1,929 |
Total at March 31, 2022 |  | $ | 40,432 |  |  | $ | (726 | ) |  | $ | 39,706 |  |  | $ | — |  |  | $ | — |  |  | $ | 39,706 |
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 |  | 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 March 31, 2022 |  | Three Months Ended March 31, 2021 |  | Six Months Ended March 31, 2022 |  |  | Six Months Ended March 31, 2021 |
Commodity contracts |  | Cost of product (a) |  | $ | (8,545 | ) | $ | (5,064 | ) | $ | (18,520 | ) |  | $ | 6,514 |
Commodity contracts |  | Cost of installations and service (a) |  | $ | (1,355 | ) | $ | (130 | ) | $ | (1,482 | ) |  | $ | (37 | )
Commodity contracts |  | Delivery and branch expenses (a) |  | $ | (2,968 | ) | $ | (193 | ) | $ | (3,252 | ) |  | $ | 8 |
Commodity contracts |  | (Increase) / decrease in the fair value of derivative instruments (b) |  | $ | (17,615 | ) | $ | (8,224 | ) | $ | (4,212 | ) |  | $ | (25,619 | )
(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.

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