CONDENSED CONSOLIDATED BALANCE SHEET - USD ($) $ in Thousands	Sep. 30, 2015	Jun. 30, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 74,474		$ 74,488	$ 180,307		$ 331,224
Restricted cash	0		177,647
Accounts receivable	57,859		120,359
Fair value of derivative contracts	65,700		139,179
Current income tax receivable	0		7,212
Inventory	3,709		3,709
Other current assets	9,203		8,118
Total current assets	210,945		530,712
Oil and gas properties, full cost method of accounting:
Proved	9,204,693		8,817,268
Less: accumulated depreciation, depletion and amortization	(8,199,973)		(6,970,631)
Net proved oil and gas properties	1,004,720		1,846,637
Unevaluated	518,963		567,365
Other property and equipment, net	30,327		32,340
Fair value of derivative contracts	5,734		14,333
Other assets, net	25,623		27,224
Total assets	1,796,312		3,018,611
Current liabilities:
Accounts payable to vendors	66,054		132,629
Undistributed oil and gas proceeds	10,461		23,232
Accrued interest	22,241		9,022
Deferred taxes	0		20,119
Asset retirement obligations	42,624		69,400
Other current liabilities	42,134		49,505
Total current liabilities	183,514		303,907
Long-term debt	1,052,183		1,041,035
Deferred taxes	0		286,343
Asset retirement obligations	243,567		247,009
Fair value of derivative contracts	172		0
Other long-term liabilities	25,347		38,714
Total liabilities	$ 1,504,783		$ 1,917,008
Commitments and contingencies
Stockholders’ equity:
Common stock, $.01 par value; authorized 150,000,000 shares; issued 55,302,325 and 54,884,542 shares, respectively	$ 553		$ 549
Treasury stock (16,582 shares, at cost)	(860)		(860)
Additional paid-in capital	1,643,746		1,633,307
Accumulated deficit	(1,386,967)		(614,708)
Accumulated other comprehensive income	35,057	$ 40,700	83,315	$ 11,200	$ (18,200)	$ (2,100)
Total stockholders’ equity	291,529		1,101,603
Total liabilities and stockholders’ equity	$ 1,796,312		$ 3,018,611