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Derivative Instruments - Effect of Derivative Instrument on Statement of Income (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Derivative [Line Items] |  |  |
Cash (Paid) Received in Settlement of Commodity Derivative Instruments: | $ (539,016) | $ 461,217 | $ 69,780
Unrealized (Loss) Gain on Commodity Derivative Instruments: | (1,093,717) | (288,235) | 306,325
(Loss) Gain on Commodity Derivative Instruments | (1,632,733) | 172,982 | 376,105
Cash (Paid) Received in Settlement of Interest Rate Swaps | (5,574) | (3,141) | 223
Unrealized Gain (Loss) on Interest Rate Swaps | 8,485 | (13,051) | (1,219)
Basis Swaps |  |  |
Derivative [Line Items] |  |  |
Cash (Paid) Received in Settlement of Commodity Derivative Instruments: | 57,603 | 70,670 | (13,119)
Unrealized (Loss) Gain on Commodity Derivative Instruments: | 147,110 | 119,073 | (100,147)
(Loss) Gain on Commodity Derivative Instruments | 204,713 | 189,743 | (113,266)
Interest Rate Swaps |  |  |
Derivative [Line Items] |  |  |
(Loss) Gain on Commodity Derivative Instruments | 2,911 | (16,192) | (996)
Natural Gas Revenue | Commodity Swaps |  |  |
Derivative [Line Items] |  |  |
Cash (Paid) Received in Settlement of Commodity Derivative Instruments: | (596,619) | 390,547 | 82,899
Unrealized (Loss) Gain on Commodity Derivative Instruments: | (1,240,827) | (407,308) | 406,472
(Loss) Gain on Commodity Derivative Instruments | $ (1,837,446) | $ (16,761) | $ 489,371

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- Definition Gain (loss) incurred in hedging activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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- Definition The difference between the book value and the sale price of agreements to purchase or sell mineral resources, energy, and agricultural products at some future point. This element refers to the gain (loss) included in earnings and not to the cash proceeds. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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- Definition The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13(h)) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of open derivatives, commodity, or energy contracts, held at each balance sheet date, that was included in earnings for the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585 + Details
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