Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Accounts receivable	$ 28,457	$ 46,419
Accounts receivable, related parties		125,000
Accrued revenue	425,314	317,886
Derivative instruments	105,130	422,849
Other current assets	15,238	10,731
Total current assets	574,139	922,885
Oil and gas properties, at cost (successful efforts method):
Unproved properties	1,175,178	1,368,854
Proved properties	12,260,713	11,859,817
Gathering systems and facilities	5,802	5,802
Other property and equipment	74,361	71,895
Property and equipment, gross	13,516,054	13,306,368
Less accumulated depletion, depreciation, and amortization	(3,869,116)	(3,327,629)
Property and equipment, net	9,646,938	9,978,739
Operating lease right-of-use assets	2,613,603	2,886,500
Derivative instruments	47,293	333,174
Investment in unconsolidated affiliate	255,082	1,055,177
Other assets	13,790	21,094
Total assets	13,150,845	15,197,569
Current liabilities:
Accounts payable	26,728	14,498
Accounts payable, related parties	69,860	97,883
Accrued liabilities	343,524	400,850
Revenue distributions payable	198,117	207,988
Derivative instruments	31,242	6,721
Short-term lease liabilities	266,024	305,320
Deferred revenue, VPP	45,257
Other current liabilities	2,302	6,879
Total current liabilities	983,054	1,040,139
Long-term liabilities:
Long-term debt	3,001,593	3,758,868
Deferred income tax liability	412,252	781,987
Derivative instruments	99,172	3,519
Long-term lease liabilities	2,348,785	2,583,678
Deferred revenue, VPP	156,024
Other liabilities	59,694	58,635
Total liabilities	7,060,574	8,226,826
Commitments and contingencies (Notes 15 and 16)
Equity:
Preferred stock, $0.01 par value; authorized - 50,000 shares; none issued
Common stock, $0.01 par value; authorized - 1,000,000 shares; 295,941 shares and 268,672 shares issued and outstanding at December 31, 2019 and 2020, respectively	2,686	2,959
Additional paid-in capital	6,195,497	6,130,365
Accumulated earnings (deficit)	(430,478)	837,419
Total stockholders' equity	5,767,705	6,970,743
Noncontrolling interests	322,566
Total equity	6,090,271	6,970,743
Total liabilities and equity	$ 13,150,845	$ 15,197,569