CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (in thousands, except share data) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 0	$ 10
Accounts receivable	229,512	162,455
Derivative assets	31,303	31,203
Prepaid expenses and other	8,595	10,001
Total current assets	269,410	203,669
Property and equipment (successful efforts method):
Proved oil and gas properties	9,107,281	8,608,522
Accumulated depletion, depreciation, and amortization	(5,244,367)	(4,886,973)
Unproved oil and gas properties	656,848	714,602
Wells in progress	153,734	233,498
Other property and equipment, net of accumulated depreciation of $75,328 and $63,662, respectively	41,313	32,217
Total property and equipment, net	4,714,809	4,701,866
Noncurrent assets:
Derivative assets	13,534	23,150
Other noncurrent assets	55,245	47,746
Total noncurrent assets	68,779	70,896
Total assets	5,052,998	4,976,431
Other property and equipment, accumulated depreciation	75,328	63,662
Current liabilities:
Accounts payable and accrued expenses	496,285	371,670
Derivative liabilities	545,062	200,189
Other current liabilities	10,321	11,880
Total current liabilities	1,051,668	583,739
Noncurrent liabilities:
Revolving credit facility	52,500	93,000
Senior Notes, net	2,139,625	2,121,319
Asset retirement obligations	85,390	83,325
Derivative liabilities	116,273	22,331
Other noncurrent liabilities	55,033	56,557
Total noncurrent liabilities	2,448,821	2,376,532
Commitments and contingencies (note 6)
Stockholders’ equity:
Common stock, $0.01 par value - authorized: 200,000,000 shares; issued and outstanding: 120,970,853 and 114,742,304 shares, respectively	1,210	1,147
Additional paid-in capital	1,838,859	1,827,914
Retained earnings (deficit)	(274,745)	200,697
Accumulated other comprehensive loss	(12,815)	(13,598)
Total stockholders’ equity	1,552,509	2,016,160
Total liabilities and stockholders’ equity	$ 5,052,998	$ 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	120,970,853	114,742,304
Common Stock, Shares, Outstanding	120,970,853	114,742,304