Supplemental Oil and Gas Information (Unaudited) - Schedule of Results of Operations for Oil and Gas Producing Activities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenues
Revenues	$ 3,018,600	$ 3,448,900	$ 4,220,200
Other operating revenues	6,000	7,900	26,700
Total revenues	3,024,500	3,456,800	4,246,900
Costs and expenses
Lease operating expenses	937,000	784,400	679,300
Severance and ad valorem taxes	39,200	42,800	57,000
Transportation, gathering and processing	210,827	232,985	212,711
Costs of purchased natural gas	3,147	51,682	171,991
Exploration costs charged to expense	123,900	223,900	119,800
Undeveloped lease amortization	9,600	10,900	13,300
Depreciation, depletion and amortization	856,900	850,500	763,900
Accretion of asset retirement obligations	52,400	46,000	46,200
Impairment of assets	62,900
Selling and general expenses	23,800	37,700	44,500
Other expenses (benefits)	300	56,900	141,800
Total costs and expenses	2,319,900	2,337,800	2,250,500
Results of operations before taxes	704,600	1,119,000	1,996,400
Income tax expense (benefit)	106,300	237,800	417,300
Results of operations	598,400	881,200	1,579,100
Crude Oil and Natural Gas Liquids
Revenues
Revenues	2,714,900	3,005,800	3,500,600
Natural Gas
Revenues
Revenues	300,000	370,900	537,900
Sales of purchased natural gas
Revenues
Revenues	3,700	72,200	181,700
United States - Offshore
Revenues
Revenues	2,503,800	2,921,800	3,435,800
Other operating revenues	4,500	6,500	25,400
Total revenues	2,508,300	2,928,300	3,461,200
Costs and expenses
Lease operating expenses	749,900	630,700	522,700
Severance and ad valorem taxes	37,800	41,400	55,700
Transportation, gathering and processing	130,900	157,000	142,200
Costs of purchased natural gas	0	0	200
Exploration costs charged to expense	90,000	166,500	38,800
Undeveloped lease amortization	6,200	8,100	8,700
Depreciation, depletion and amortization	709,200	706,000	617,000
Accretion of asset retirement obligations	43,100	37,800	36,500
Impairment of assets	62,900
Selling and general expenses	(3,300)
Selling and general expenses		11,800	20,400
Other expenses (benefits)	(5,600)	31,200	126,300
Total costs and expenses	1,821,100	1,790,500	1,568,500
Results of operations before taxes	687,200	1,137,800	1,892,700
Income tax expense (benefit)	125,300	232,700	370,800
Results of operations	561,900	905,100	1,521,900
United States - Offshore | Crude Oil and Natural Gas Liquids
Revenues
Revenues	2,436,000	2,829,100	3,210,300
United States - Offshore | Natural Gas
Revenues
Revenues	67,800	92,700	225,300
United States - Offshore | Sales of purchased natural gas
Revenues
Revenues	0	0	200
Canada | Conventional gas
Revenues
Revenues	508,200	516,100	761,600
Other operating revenues	1,500	1,400	1,300
Total revenues	509,700	517,500	762,900
Costs and expenses
Lease operating expenses	185,500	151,800	155,100
Severance and ad valorem taxes	1,400	1,400	1,300
Transportation, gathering and processing	79,900	76,000	70,500
Costs of purchased natural gas	3,100	51,700	171,800
Exploration costs charged to expense	400	400	800
Undeveloped lease amortization	100	100	200
Depreciation, depletion and amortization	146,000	142,200	141,500
Accretion of asset retirement obligations	8,600	7,800	9,600
Impairment of assets	0
Selling and general expenses	20,400	16,500	21,900
Other expenses (benefits)	3,300	16,800	12,400
Total costs and expenses	448,700	464,700	585,100
Results of operations before taxes	61,000	52,800	177,800
Income tax expense (benefit)	12,000	11,200	43,600
Results of operations	49,000	41,600	134,200
Canada | Crude Oil and Natural Gas Liquids | Conventional gas
Revenues
Revenues	272,300	165,700	267,500
Canada | Natural Gas | Conventional gas
Revenues
Revenues	232,200	278,200	312,600
Canada | Sales of purchased natural gas | Conventional gas
Revenues
Revenues	3,700	72,200	181,500
Other
Revenues
Revenues	6,600	11,000	22,800
Other operating revenues		0	0
Total revenues	6,600	11,000	22,800
Costs and expenses
Lease operating expenses	1,600	1,900
Lease operating expenses			1,500
Severance and ad valorem taxes	0	0	0
Transportation, gathering and processing	0	0	0
Costs of purchased natural gas	0	0	0
Exploration costs charged to expense	33,500	57,000	80,200
Undeveloped lease amortization	3,300	2,700	4,400
Depreciation, depletion and amortization	1,700	2,300	5,400
Accretion of asset retirement obligations	700	400	100
Impairment of assets	0
Selling and general expenses	6,700	9,400	2,200
Other expenses (benefits)	2,600	8,900	3,100
Total costs and expenses	50,100	82,600	96,900
Results of operations before taxes	(43,500)	(71,600)	(74,100)
Income tax expense (benefit)	(31,000)	(6,100)	2,900
Results of operations	(12,500)	(65,500)	(77,000)
Other | Crude Oil and Natural Gas Liquids
Revenues
Revenues	6,600	11,000	22,800
Other | Natural Gas
Revenues
Revenues	0	0	0
Other | Sales of purchased natural gas
Revenues
Revenues	$ 0	$ 0	$ 0