CONSOLIDATED BALANCE SHEETS (in thousands, except share data) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 10	$ 77,965
Accounts receivable	184,732	167,536
Derivative assets	55,184	175,130
Prepaid expenses and other	12,708	8,632
Total current assets	252,634	429,263
Property and equipment (successful efforts method):
Proved oil and gas properties	8,934,020	7,278,362
Accumulated depletion, depreciation, and amortization	(4,177,876)	(3,417,953)
Unproved oil and gas properties	1,005,887	1,581,401
Wells in progress	118,769	295,529
Other property and equipment, net of accumulated depreciation of $64,032 and $57,102, respectively	72,848	93,826
Total property and equipment, net	5,953,648	5,831,165
Noncurrent assets:
Derivative assets	20,624	58,499
Other noncurrent assets	65,326	33,935
Total noncurrent assets	85,950	92,434
Total assets	6,292,232	6,352,862
Current liabilities:
Accounts payable and accrued expenses	402,008	403,199
Derivative liabilities	50,846	62,853
Other current liabilities	19,189	0
Total current liabilities	472,043	466,052
Noncurrent liabilities:
Revolving credit facility	122,500	0
Senior Notes, net of unamortized deferred financing costs	2,453,035	2,448,439
Senior Convertible Notes, net of unamortized discount and deferred financing costs	157,263	147,894
Asset retirement obligations	84,134	91,859
Deferred income taxes	189,386	223,278
Derivative liabilities	3,444	12,496
Other noncurrent liabilities	61,433	42,522
Total noncurrent liabilities	3,071,195	2,966,488
Commitments and contingencies (note 6)
Stockholders' Equity:
Common stock, $0.01 par value - authorized: 200,000,000 shares; issued and outstanding: 112,987,952 and 112,241,966 shares, respectively	1,130	1,122
Additional paid-in capital	1,791,596	1,765,738
Retained earnings	967,587	1,165,842
Accumulated other comprehensive loss	(11,319)	(12,380)
Total stockholders' equity	2,748,994	2,920,322
Total liabilities and stockholders' equity	$ 6,292,232	$ 6,352,862