CONDENSED CONSOLIDATED BALANCE SHEET (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015		Dec. 31, 2014		Mar. 31, 2014	Dec. 31, 2013
Current assets:
Cash and cash equivalents	$ 162,128		$ 74,488		$ 202,761	$ 331,224
Restricted cash			177,647
Accounts receivable	112,150		120,359
Fair value of derivative contracts	124,192		139,179
Current income tax receivable	24		7,212
Inventory	3,709		3,709
Other current assets	6,234		8,118
Total current assets	408,437		530,712
Oil and gas properties, full cost method of accounting:
Proved	8,887,832		8,817,268
Less: accumulated depreciation, depletion and amortization	(7,546,222)		(6,970,631)
Net proved oil and gas properties	1,341,610		1,846,637
Unevaluated	602,467		567,365
Other property and equipment, net	31,828		32,340
Fair value of derivative contracts	13,966		14,333
Other assets, net	24,672		27,224
Total assets	2,422,980		3,018,611
Current liabilities:
Accounts payable to vendors	68,146		132,629
Undistributed oil and gas proceeds	26,202		23,232
Accrued interest	22,243		9,022
Deferred taxes	23,378	[1]	20,119	[1]
Asset retirement obligations	60,837		69,400
Other current liabilities	40,286		49,505
Total current liabilities	241,092		303,907
Long-term debt	1,044,675		1,041,035
Deferred taxes	98,194	[1]	286,343	[1]
Asset retirement obligations	244,835		247,009
Other long-term liabilities	31,604		38,714
Total liabilities	1,660,400		1,917,008
Commitments and contingencies
Stockholders' equity:
Common stock, $.01 par value; authorized 100,000,000 shares; issued 55,254,713 and 54,884,542 shares, respectively	553		549
Treasury stock (16,582 shares, at cost)	(860)		(860)
Additional paid-in capital	1,634,171		1,633,307
Accumulated deficit	(942,096)		(614,708)
Accumulated other comprehensive income	70,812		83,315		(9,200)	(2,100)
Total stockholders' equity	762,580		1,101,603
Total liabilities and stockholders' equity	$ 2,422,980		$ 3,018,611

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