CONDENSED CONSOLIDATED BALANCE SHEETS (UNAUDITED) (in thousands, except share data) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 0	$ 10
Accounts receivable	199,631	162,455
Derivative assets	20,859	31,203
Prepaid expenses and other	9,792	10,001
Total current assets	230,282	203,669
Property and equipment (successful efforts method):
Proved oil and gas properties	8,735,538	8,608,522
Accumulated depletion, depreciation, and amortization	(5,051,876)	(4,886,973)
Unproved oil and gas properties	705,822	714,602
Wells in progress	291,146	233,498
Other property and equipment, net of accumulated depreciation of $64,242 and $63,662, respectively	31,986	32,217
Total property and equipment, net	4,712,616	4,701,866
Noncurrent assets:
Derivative assets	13,567	23,150
Other noncurrent assets	59,180	47,746
Total noncurrent assets	72,747	70,896
Total assets	5,015,645	4,976,431
Other property and equipment, accumulated depreciation	64,242	63,662
Current liabilities:
Accounts payable and accrued expenses	394,226	371,670
Derivative liabilities	371,802	200,189
Other current liabilities	10,591	11,880
Total current liabilities	776,619	583,739
Noncurrent liabilities:
Revolving credit facility	135,000	93,000
Senior Notes, net	2,125,651	2,121,319
Asset retirement obligations	84,206	83,325
Derivative liabilities	67,595	22,331
Other noncurrent liabilities	56,902	56,557
Total noncurrent liabilities	2,469,354	2,376,532
Commitments and contingencies (note 6)
Stockholders’ equity:
Common stock, $0.01 par value - authorized: 200,000,000 shares; issued and outstanding: 114,742,304 shares as of March 31, 2021, and December 31, 2020	1,147	1,147
Additional paid-in capital	1,833,651	1,827,914
Retained earnings (deficit)	(51,719)	200,697
Accumulated other comprehensive loss	(13,407)	(13,598)
Total stockholders’ equity	1,769,672	2,016,160
Total liabilities and stockholders’ equity	$ 5,015,645	$ 4,976,431
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	114,742,304	114,742,304
Common Stock, Shares, Outstanding	114,742,304	114,742,304