Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Current assets:
Cash and cash equivalents	$ 112,974	$ 142,340
Accounts receivable—oil and gas	71,872	103,858
Accounts receivable—related parties	16	46
Prepaid expenses and other current assets	3,905	3,714
Short-term derivative instruments	142,794	78,391
Total current assets	331,561	328,349
Property and equipment:
Oil and natural gas properties, full-cost accounting, $1,817,701 and $1,465,538 excluded from amortization in 2015 and 2014, respectively	5,424,342	3,923,154
Other property and equipment	33,171	18,344
Accumulated depletion, depreciation, amortization and impairment	(2,829,110)	(1,050,879)
Property and equipment, net	2,628,403	2,890,619
Other assets:
Equity investments	242,393	369,581
Long-term derivative instruments	51,088	24,448
Deferred tax asset	74,925	0
Other assets	6,364	6,476
Total other assets	374,770	400,505
Total assets	3,334,734	3,619,473
Current liabilities:
Accounts payable and accrued liabilities	265,128	371,410
Asset retirement obligation—current	75	75
Short-term derivative instruments	437	0
Deferred tax liability	50,697	27,070
Current maturities of long-term debt	179	168
Total current liabilities	316,516	398,723
Long-term derivative instrument	6,935	0
Asset retirement obligation—long-term	26,362	17,863
Deferred tax liability	0	203,195
Long-term debt, net of current maturities	946,084	703,396
Total liabilities	$ 1,295,897	$ 1,323,177
Commitments and contingencies (Notes 15 and 16)
Preferred stock, $.01 par value; 5,000,000 authorized, 30,000 authorized as redeemable 12% cumulative preferred stock, Series A; 0 issued and outstanding	$ 0	$ 0
Stockholders’ equity:
Common stock, $.01 par value; 200,000,000 authorized, 108,322,250 issued and outstanding in 2015 and 85,655,438 in 2014	1,082	856
Paid-in capital	2,824,303	1,828,602
Accumulated other comprehensive loss	(55,177)	(26,675)
Retained (deficit) earnings	(731,371)	493,513
Total stockholders’ equity	2,038,837	2,296,296
Total liabilities and stockholders’ equity	$ 3,334,734	$ 3,619,473