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Derivative Instruments - Effect of Derivative Instrument on Statement of Income (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Commodity Derivative Instruments: | $ 163,026 | $ (1,812,777) | $ (539,016)
Unrealized Gain (Loss) on Commodity Derivative Instruments: | 1,765,626 | (850,998) | (1,093,717)
Gain (Loss) on Commodity Derivative Instruments | 1,928,652 | (2,663,775) | (1,632,733)
Cash Received (Paid) in Settlement of Interest Rate Swaps | 4,207 | (1,572) | (5,574)
Unrealized (Loss) Gain on Interest Rate Swaps | (3,463) | 10,348 | 8,485
Natural Gas Basis Swaps |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Commodity Derivative Instruments: | 98,582 | 158,510 | 57,603
Unrealized Gain (Loss) on Commodity Derivative Instruments: | (93,222) | 71,426 | 147,110
Gain (Loss) on Commodity Derivative Instruments | 5,360 | 229,936 | 204,713
Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
Gain (Loss) on Commodity Derivative Instruments | 744 | 8,776 | 2,911
Commodity Derivatives |  |  |
Derivative [Line Items] |  |  |
Derivative Asset | 6,741 |  |
Gas derivatives settled not paid | (900) | 77,662 |
Natural Gas Revenue | Commodity Swaps |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Commodity Derivative Instruments: | 62,567 | (1,971,287) | (596,619)
Unrealized Gain (Loss) on Commodity Derivative Instruments: | 1,858,060 | (922,424) | (1,240,827)
Gain (Loss) on Commodity Derivative Instruments | 1,920,627 | (2,893,711) | (1,837,446)
Propane Commodity Swaps (Mbbls) | Propane Swaps |  |  |
Derivative [Line Items] |  |  |
Realized Gain (Loss) on Commodity Derivative Instruments: | 1,877 | 0 | 0
Unrealized Gain (Loss) on Commodity Derivative Instruments: | 788 | 0 | 0
Gain (Loss) on Commodity Derivative Instruments | $ 2,665 | $ 0 | $ 0

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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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