Property, Plant and Equipment - Schedule of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 4,469,281	$ 4,300,666
Accumulated depletion, depreciation and impairment	(3,473,484)	(3,336,184)
Property, plant, and equipment, net	995,797	964,482
Right-of-use asset	13,900	11,400
Operating lease and finance lease, net	3,900	4,400
Oil and natural gas properties
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	4,434,338	4,268,531
Proved
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	4,302,473	4,106,768
Unproved
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	131,865	161,763
Other
Property, Plant and Equipment [Line Items]
Property, plant, and equipment, gross	$ 34,943	$ 32,135