CONDENSED CONSOLIDATED BALANCE SHEET - USD ($) $ in Thousands		Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents		$ 141,655		$ 74,488	$ 333,886		$ 331,224
Restricted cash				177,647
Accounts receivable		68,706		120,359
Fair value of derivative contracts		74,319		139,179
Current income tax receivable		6		7,212
Inventory		3,709		3,709
Other current assets		10,076		8,118
Total current assets		298,471		530,712
Oil and gas properties, full cost method of accounting:
Proved		9,074,425		8,817,268
Less: accumulated depreciation, depletion and amortization		(7,846,343)		(6,970,631)
Net proved oil and gas properties		1,228,082		1,846,637
Unevaluated		529,589		567,365
Other property and equipment, net		30,736		32,340
Fair value of derivative contracts		8,231		14,333
Other assets, net		28,082		27,224
Total assets		2,123,191		3,018,611
Current liabilities:
Accounts payable to vendors		69,423		132,629
Undistributed oil and gas proceeds		17,000		23,232
Accrued interest		9,027		9,022
Deferred taxes	[1]	7,065		20,119
Asset retirement obligations		56,176		69,400
Other current liabilities		46,780		49,505
Total current liabilities		205,471		303,907
Long-term debt		1,048,406		1,041,035
Deferred taxes	[1]	11,752		286,343
Asset retirement obligations		240,613		247,009
Other long-term liabilities		32,213		38,714
Total liabilities		$ 1,538,455		$ 1,917,008
Commitments and contingencies
Stockholders' equity:
Common stock, $.01 par value; authorized 150,000,000 shares; issued 55,283,825 and 54,884,542 shares, respectively		$ 553		$ 549
Treasury stock (16,582 shares, at cost)		(860)		(860)
Additional paid-in capital		1,639,389		1,633,307
Accumulated deficit		(1,095,002)		(614,708)
Accumulated other comprehensive income		40,656	$ 70,800	83,315	$ (18,200)	$ (9,200)	$ (2,100)
Total stockholders' equity		584,736		1,101,603
Total liabilities and stockholders' equity		$ 2,123,191		$ 3,018,611

[1] Deferred income taxes have been allocated to our Guarantor Subsidiaries where related oil and gas properties reside.