CONSOLIDATED BALANCE SHEET (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013		Dec. 31, 2012
Current assets:
Cash and cash equivalents	$ 331,224		$ 279,526
Accounts receivable	171,971		167,288
Fair value of hedging contracts	4,549		39,655
Current income tax receivable	7,366		10,027
Deferred taxes	31,710	[1]	15,514	[1]
Inventory	3,723		4,207
Other current assets	1,874		3,626
Total current assets	552,417		519,843
Oil and gas properties, full cost method of accounting:
Proved	7,804,117		7,244,466
Less: accumulated depreciation, depletion and amortization	(5,908,760)		(5,510,166)
Net proved oil and gas properties	1,895,357		1,734,300
Unevaluated	724,339		447,795
Other property and equipment, net of accumulated depreciation of $21,748 and $26,429, respectively	26,178		22,115
Fair value of hedging contracts	1,378		9,199
Other assets, net of accumulated depreciation and amortization of $5,768 and $6,438, respectively	48,887		43,179
Total assets	3,248,556		2,776,431
Current liabilities:
Accounts payable to vendors	195,677		94,361
Undistributed oil and gas proceeds	37,029		23,414
Accrued interest	9,022		18,546
Fair value of hedging contracts	7,753		149
Asset retirement obligations	67,161		66,260
Other current liabilities	54,520		16,765
Total current liabilities	371,162		219,495
Long-term debt	1,027,084		914,126
Deferred taxes	390,693	[1]	310,830	[1]
Asset retirement obligations	435,352		422,042
Fair value of hedging contracts	470		1,530
Other long-term liabilities	53,509		36,275
Total liabilities	2,278,270		1,904,298
Commitments and contingencies
Stockholders' equity:
Common stock, $.01 par value; authorized 100,000,000 shares; issued 48,750,533 and 48,392,552 shares, respectively	488		484
Treasury stock (16,582 shares, at cost)	(860)		(860)
Additional paid-in capital	1,397,885		1,386,475
Accumulated deficit	(425,165)		(542,799)
Accumulated other comprehensive income (loss)	(2,062)		28,833
Total stockholders' equity	970,286		872,133
Total liabilities and stockholders' equity	$ 3,248,556		$ 2,776,431

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