Fair Value Measurements - Carrying Amounts and Fair Values of Financial Instruments (Detail) - USD ($) $ in Thousands		Sep. 30, 2022	Dec. 31, 2021
Contingent Consideration
Assets:
Divestiture contingent consideration		$ 34,400
Reported Value Measurement
Assets:
Commodity swaps, collars and basis swaps		16,362	$ 17,699
Marketable securities	[1]	52,355	69,606
(Liabilities):
Commodity swaps, collars and basis swaps		(808,580)	(170,983)
Bank credit facility	[2]	0	0
Deferred compensation plan	[3]	(178,813)	(165,395)
Reported Value Measurement | Contingent Consideration
Assets:
Divestiture contingent consideration		34,410	26,640
Estimate of Fair Value Measurement
Assets:
Commodity swaps, collars and basis swaps		16,362	17,699
Marketable securities	[1]	52,355	69,606
(Liabilities):
Commodity swaps, collars and basis swaps		(808,580)	(170,983)
Bank credit facility	[2]	0	0
Deferred compensation plan	[3]	(178,813)	(165,395)
Estimate of Fair Value Measurement | Contingent Consideration
Assets:
Divestiture contingent consideration		34,410	26,640
5.00% Senior Notes Due 2022 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	0	(169,589)
5.00% Senior Notes Due 2022 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	0	(171,488)
5.875% Senior Notes Due 2022 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	0	(48,528)
5.875% Senior Notes Due 2022 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	0	(48,955)
5.00% Senior Notes Due 2023 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	(528,585)	(532,335)
5.00% Senior Notes Due 2023 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	(526,814)	(543,471)
4.875% Senior Notes Due 2025 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	(750,000)	(750,000)
4.875% Senior Notes Due 2025 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	(707,010)	(776,153)
9.25% Senior Notes Due 2026 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	0	(850,000)
9.25% Senior Notes Due 2026 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	0	(916,929)
4.75% senior subordinated notes due 2020 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	(500,000)	0
4.75% senior subordinated notes due 2020 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	(433,600)	0
8.25% senior notes due 2029 | Reported Value Measurement
(Liabilities):
Senior notes	[2]	(600,000)	(600,000)
8.25% senior notes due 2029 | Estimate of Fair Value Measurement
(Liabilities):
Senior notes	[2]	$ (608,514)	$ (669,648)

[1] Marketable securities, which are held in our deferred compensation plans, are actively traded on major exchanges.

[2] The book value of our bank debt approximates fair value because of its floating rate structure. The fair value of our senior notes is based on end of period market quotes which are Level 2 inputs.

[3] The fair value of our deferred compensation plan is updated to the closing price on the balance sheet date which is a Level 1 input.