CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2017	Dec. 31, 2016
ASSETS
Cash and cash equivalents	$ 313,943	$ 9,372
Accounts receivable	160,154	151,950
Derivative assets	64,266	54,521
Prepaid expenses and other	10,752	8,799
Total current assets	549,115	224,642
Proved oil and gas properties	6,139,379	5,700,418
Less - accumulated depletion, depreciation, and amortization	(3,171,575)	(2,836,532)
Unproved oil and gas properties	2,047,203	2,471,947
Wells in progress	321,347	235,147
Oil and gas properties held for sale, net	111,700	372,621
Other property and equipment, net of accumulated depreciation of $49,985 and $42,882, respectively	106,738	137,753
Total property and equipment, net	5,554,792	6,081,354
Derivative assets	40,362	67,575
Other noncurrent assets	32,507	19,940
Total other noncurrent assets	72,869	87,515
Total assets	6,176,776	6,393,511
LIABILITIES
Accounts payable and accrued expenses	386,630	299,708
Derivative liabilities	172,582	115,464
Total current liabilities	559,212	415,172
Revolving credit facility	0	0
Senior Notes, net of unamortized deferred financing costs	2,769,663	2,766,719
Senior Convertible Notes, net of unamortized discount and deferred financing costs	139,107	130,856
Asset retirement obligations	103,026	96,134
Asset retirement obligations associated with oil and gas properties held for sale	11,369	26,241
Deferred income taxes	79,989	315,672
Derivative liabilities	71,402	98,340
Other noncurrent liabilities	48,400	47,244
Total noncurrent liabilities	3,222,956	3,481,206
Commitments and contingencies (note 6)
STOCKHOLDERS' EQUITY
Common stock, $0.01 par value - authorized: 200,000,000 shares; issued and outstanding: 111,687,016 and 111,257,500 shares, respectively	1,117	1,113
Additional paid-in capital	1,741,623	1,716,556
Retained earnings	665,657	794,020
Accumulated other comprehensive loss	(13,789)	(14,556)
Total stockholders' equity	2,394,608	2,497,133
Total liabilities and stockholders' equity	$ 6,176,776	$ 6,393,511