CONSOLIDATED BALANCE SHEETS (in thousands, except share data) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 10	$ 10
Accounts receivable	162,455	184,732
Derivative assets	31,203	55,184
Prepaid expenses and other	10,001	12,708
Total current assets	203,669	252,634
Property and equipment (successful efforts method):
Proved oil and gas properties	8,608,522	8,934,020
Accumulated depletion, depreciation, and amortization	(4,886,973)	(4,177,876)
Unproved oil and gas properties	714,602	1,005,887
Wells in progress	233,498	118,769
Other property and equipment, net of accumulated depreciation of $63,662 and $64,032, respectively	32,217	72,848
Total property and equipment, net	4,701,866	5,953,648
Noncurrent assets:
Derivative assets	23,150	20,624
Other noncurrent assets	47,746	65,326
Total noncurrent assets	70,896	85,950
Total assets	4,976,431	6,292,232
Other property and equipment, accumulated depreciation	63,662	64,032
Current liabilities:
Accounts payable and accrued expenses	371,670	402,008
Derivative liabilities	200,189	50,846
Other current liabilities	11,880	19,189
Total current liabilities	583,739	472,043
Noncurrent liabilities:
Revolving credit facility	93,000	122,500
Senior Notes, net	2,121,319	2,610,298
Asset retirement obligations	83,325	84,134
Deferred income taxes	0	189,386
Derivative liabilities	22,331	3,444
Other noncurrent liabilities	56,557	61,433
Total noncurrent liabilities	2,376,532	3,071,195
Commitments and contingencies (note 6)
Stockholders’ equity:
Common stock, $0.01 par value - authorized: 200,000,000 shares; issued and outstanding: 114,742,304 and 112,987,952 shares, respectively	1,147	1,130
Additional paid-in capital	1,827,914	1,791,596
Retained earnings	200,697	967,587
Accumulated other comprehensive loss	(13,598)	(11,319)
Total stockholders’ equity	2,016,160	2,748,994
Total liabilities and stockholders’ equity	$ 4,976,431	$ 6,292,232
Common Stock, par value per share	$ 0.01	$ 0.01
Common Stock, shares authorized	200,000,000	200,000,000
Common Stock, shares issued	114,742,304	112,987,952
Common Stock, shares outstanding	114,742,304	112,987,952