CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (in thousands, except share data) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 29,800	$ 10
Accounts receivable	272,248	162,455
Derivative assets	24,514	31,203
Prepaid expenses and other	9,708	10,001
Total current assets	336,270	203,669
Property and equipment (successful efforts method):
Proved oil and gas properties	9,271,463	8,608,522
Accumulated depletion, depreciation, and amortization	(5,439,387)	(4,886,973)
Unproved oil and gas properties	654,513	714,602
Wells in progress	142,259	233,498
Other property and equipment, net of accumulated depreciation of $65,462 and $63,662, respectively	36,635	32,217
Total property and equipment, net	4,665,483	4,701,866
Noncurrent assets:
Derivative assets	6,096	23,150
Other noncurrent assets	54,111	47,746
Total noncurrent assets	60,207	70,896
Total assets	5,061,960	4,976,431
Other property and equipment, accumulated depreciation	65,462	63,662
Current liabilities:
Accounts payable and accrued expenses	542,474	371,670
Derivative liabilities	552,044	200,189
Other current liabilities	9,049	11,880
Total current liabilities	1,103,567	583,739
Noncurrent liabilities:
Revolving credit facility	0	93,000
Senior Notes, net	2,077,630	2,121,319
Asset retirement obligations	85,514	83,325
Derivative liabilities	90,655	22,331
Other noncurrent liabilities	67,695	56,557
Total noncurrent liabilities	2,321,494	2,376,532
Commitments and contingencies (note 6)
Stockholders’ equity:
Common stock, $0.01 par value - authorized: 200,000,000 shares; issued and outstanding: 121,473,790 and 114,742,304 shares, respectively	1,215	1,147
Additional paid-in capital	1,838,620	1,827,914
Retained earnings (deficit)	(190,367)	200,697
Accumulated other comprehensive loss	(12,569)	(13,598)
Total stockholders’ equity	1,636,899	2,016,160
Total liabilities and stockholders’ equity	$ 5,061,960	$ 4,976,431
Common Stock, Par Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares Authorized	200,000,000	200,000,000
Common Stock, Shares, Issued	121,473,790	114,742,304
Common Stock, Shares, Outstanding	121,473,790	114,742,304