Derivative Financial Instruments Fair Value (Details) - USD ($)	Sep. 30, 2021	Dec. 31, 2020
Fair value of derivative assets and liabilities
Derivative, fair value, net	$ (612,100,000)	$ (168,200,000)
Derivative assets, current	24,514,000	31,203,000
Derivative assets, noncurrent	6,096,000	23,150,000
Total derivative assets	30,610,000	54,353,000
Derivative liabilities, current	552,044,000	200,189,000
Derivatives liabilities, noncurrent	90,655,000	22,331,000
Total derivative liabilities	(642,699,000)	(222,520,000)
Derivative asset, amounts not offset in the accompanying balance sheets	(30,610,000)	(53,598,000)
Derivative liabilities, amounts not offset in the accompanying balance sheets	30,610,000	53,598,000
Derivative asset, fair value, net amounts	0	755,000
Derivative liabilities, fair value, net amounts	(612,089,000)	(168,922,000)
Not Designated as Hedging Instrument
Fair value of derivative assets and liabilities
Derivative assets, current	24,514,000	31,203,000
Derivative assets, noncurrent	6,096,000	23,150,000
Derivative liabilities, current	552,044,000	200,189,000
Derivatives liabilities, noncurrent	90,655,000	22,331,000
Fair Value, Recurring \| Fair Value, Inputs, Level 2 \| Not Designated as Hedging Instrument
Fair value of derivative assets and liabilities
Total derivative assets	30,610,000	54,353,000
Total derivative liabilities	$ 642,699,000	$ 222,520,000

Fair value, after effects of master netting arrangements, deduction of assets not subject to a master netting arrangement and elected not to be offset, of 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, offset against an obligation to return collateral.

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