CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (in thousands, except share data) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 10	$ 10
Accounts receivable	127,173	184,732
Derivative assets	211,582	55,184
Prepaid expenses and other	16,704	12,708
Total current assets	355,469	252,634
Property and equipment (successful efforts method):
Proved oil and gas properties	8,134,461	8,934,020
Accumulated depletion, depreciation, and amortization	(4,536,537)	(4,177,876)
Unproved oil and gas properties	923,666	1,005,887
Wells in progress	266,957	118,769
Other property and equipment, net of accumulated depreciation of $65,447 and $64,032, respectively	37,278	72,848
Total property and equipment, net	4,825,825	5,953,648
Noncurrent assets:
Derivative assets	34,390	20,624
Other noncurrent assets	51,944	65,326
Total noncurrent assets	86,334	85,950
Total assets	5,267,628	6,292,232
Other property and equipment, accumulated depreciation	65,447	64,032
Current liabilities:
Accounts payable and accrued expenses	257,053	402,008
Derivative liabilities	38,250	50,846
Other current liabilities	12,597	19,189
Total current liabilities	307,900	472,043
Noncurrent liabilities:
Revolving credit facility	193,000	122,500
Senior Notes, net	2,263,119	2,610,298
Asset retirement obligations	86,628	84,134
Deferred income taxes	57,049	189,386
Derivative liabilities	24,028	3,444
Other noncurrent liabilities	55,072	61,433
Total noncurrent liabilities	2,678,896	3,071,195
Commitments and contingencies (note 6)
Stockholders’ equity:
Common stock, $0.01 par value - authorized: 200,000,000 shares; issued and outstanding: 113,553,271 and 112,987,952 shares, respectively	1,136	1,130
Additional paid-in capital	1,825,327	1,791,596
Retained earnings	465,310	967,587
Accumulated other comprehensive loss	(10,941)	(11,319)
Total stockholders' equity	2,280,832	2,748,994
Total liabilities and stockholders’ equity	$ 5,267,628	$ 6,292,232
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	200,000,000	200,000,000
Common Stock, Shares, Issued	113,553,271	112,987,952
Common Stock, Shares, Outstanding	113,553,271	112,987,952