Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014		Dec. 31, 2013
Current Assets:
Cash and cash equivalents	$ 406		$ 3,277
Accounts receivable	48,451		70,897
Deferred tax asset	6,243		10,715
Other current assets	9,569		7,600
Total Current Assets	64,669		92,489
Property and Equipment:
Property and Equipment, including $64,903 and $71,452 of unproved property costs not being amortized, respectively	5,934,155		5,714,099
Less - Accumulated depreciation, depletion, and amortization	(3,839,118)		(3,125,282)
Property and Equipment, Net	2,095,037		2,588,817
Other Long-Term Assets	13,641		17,199
Total Assets	2,173,347		2,698,505
Current Liabilities:
Accounts payable and accrued liabilities	68,244		82,318
Accrued capital costs	41,461		61,164
Accrued interest	21,389		21,561
Undistributed oil and gas revenues	17,825		10,990
Total Current Liabilities	148,919		176,033
Long-Term Debt	1,074,534	[1]	1,142,368	[1]
Deferred Tax Liabilities	86,376		241,205
Asset Retirement Obligation	62,122		63,225
Other Long-Term Liabilities	7,018		10,324
Commitments and Contingencies	0		0
Stockholders' Equity:
Preferred stock, $.01 par value, 5,000,000 shares authorized, none outstanding	0		0
Common stock, $.01 par value, 150,000,000 shares authorized, 44,379,463 and 43,915,346 shares issued, and 43,918,029 and 43,401,920 shares outstanding, respectively	444		439
Additional paid-in capital	771,972		762,242
Treasury stock held, at cost, 461,434 and 513,426 shares, respectively	(9,855)		(12,575)
Retained earnings	31,817		315,244
Total Stockholders' Equity	794,378		1,065,350
Total Liabilities and Stockholders' Equity	$ 2,173,347		$ 2,698,505

[1] Amounts are shown net of any debt discount or premium