Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2021

Fair Value Disclosures [Abstract]

Fair Value Hierarchy Table for Assets and Liabilities Measured at Fair Value

The following tables present the fair value hierarchy for assets and liabilities measured at fair value, on a recurring basis (in thousands):

		Fair Value Measurements at June 30, 2021 using:
		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Carrying Value as of June 30, 2021
Trading securities held in the deferred compensation    plans		$	66,804	$	—		$	—		$	66,804
Commodity price derivatives	–swaps		—		(161,808	)		—			(161,808	)
	–collars		—		(31,128	)		(5,814	)		(36,942	)
	–three-way collars		—		(62,582	)		—			(62,582	)
	–basis swaps		—		26,063			—			26,063
	–swaptions		—		—			(26,414	)		(26,414	)
Derivatives–freight swaps			—		37			—			37
Divestiture contingent consideration			—		37,350			—			37,350

		Fair Value Measurements at December 31, 2020 using:
		Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)			Significant Unobservable Inputs (Level 3)			Total Carrying Value as of December 31, 2020
Trading securities held in the deferred compensation    plans		$	63,942	$	—		$	—		$	63,942
Commodity price derivatives	–swaps		—		6,642			—			6,642
	–calls		—		—			(546	)		(546	)
	–collars		—		7,016			(3,487	)		3,529
	–three-way collars		—		(17,818	)		—			(17,818	)
	–basis swaps		—		4,491			—			4,491
	–swaptions		—		—			(9,803	)		(9,803	)
Derivatives–freight swaps			—		1,104			—			1,104
Divesture contingent consideration			—		15,960			—			15,960

Reconciliation of the Beginning and Ending Balances for Derivative Instruments Classified as Level 3 in the Fair Value Hierarchy

The following is a reconciliation of the beginning and ending balances for derivative instruments classified as Level 3 in the fair value hierarchy (in thousands):

	As of June 30,  2021
Balance at December 31, 2020	$	(13,836	)
Total losses:
Included in earnings		(7,627	)
Additions		(20,515	)
Settlements		5,176
Transfers out of Level 3		4,574
Balance at June 30, 2021	$	(32,228	)

Carrying Amounts and Fair Values of Financial Instruments

The following presents the carrying amounts and the fair values of our financial instruments as of June 30, 2021 and December 31, 2020 (in thousands):

	June 30, 2021						December 31, 2020
	Carrying Value			Fair Value			Carrying Value			Fair Value
Assets:
Commodity swaps, collars and basis swaps	$	9,998		$	9,998		$	24,052		$	24,052
Divestiture contingent consideration		37,350			37,350			15,960			15,960
Marketable securities (a)		66,804			66,804			63,942			63,942
(Liabilities):
Commodity swaps, collars and basis swaps		(271,644	)		(271,644	)		(36,453	)		(36,453	)
Bank credit facility (b)		(121,000	)		(121,000	)		(702,000	)		(702,000	)
5.75% senior notes due 2021 (b)		—			—			(25,496	)		(25,474	)
5.00% senior notes due 2022 (b)		(169,589	)		(173,691	)		(169,589	)		(170,128	)
5.875% senior notes due 2022 (b)		(48,528	)		(49,676	)		(48,528	)		(48,471	)
Other senior notes due 2022 (b)		—			—			(490	)		(490	)
5.00% senior notes due 2023 (b)		(532,335	)		(553,879	)		(532,335	)		(521,699	)
4.875% senior notes due 2025 (b)		(750,000	)		(778,718	)		(750,000	)		(707,918	)
9.25% senior notes due 2026 (b)		(850,000	)		(937,423	)		(850,000	)		(888,208	)
8.25% senior notes due 2029 (b)		(600,000	)		(676,512	)		—			—
5.75% senior subordinated notes due 2021 (b)		—			—			(19,896	)		(19,589	)
5.00% senior subordinated notes due 2022 (b)		—			—			(9,730	)		(9,247	)
5.00% senior subordinated notes due 2023 (b)		—			—			(7,712	)		(6,604	)
Deferred compensation plan (c)		(148,205	)		(148,205	)		(96,563	)		(96,563	)