Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2011		Dec. 31, 2010
Current Assets:
Cash and cash equivalents	$ 251,696		$ 86,367
Accounts receivable	64,392		46,975
Deferred tax assets	6,603		6,347
Other current assets	5,460		18,105
Current assets held for sale	0		564
Total Current Assets	328,151		158,358
Property and Equipment:
Property and Equipment	4,466,845		3,951,107
Less - Accumulated depreciation, depletion, and amortization	(2,599,079)		(2,378,262)
Property and Equipment, Net	1,867,766		1,572,845
Other Long-Term Assets	16,552		12,713
Total Assets	2,212,469		1,743,916
Current Liabilities:
Accounts payable and accrued liabilities	95,966		75,594
Accrued capital costs	98,844		64,879
Accrued interest	12,459		11,010
Undistributed oil and gas revenues	4,525		5,252
Total Current Liabilities	211,794		156,735
Long-Term Debt	719,775	[1]	471,624	[1]
Deferred Income Taxes	206,567		157,565
Asset Retirement Obligation	67,115		70,171
Other Long-Term Liabilities	10,709		7,804
Commitments and Contingencies
Stockholders' Equity:
Preferred stock, $.01 par value, 5,000,000 shares authorized, none outstanding
Common stock, $.01 par value, 150,000,000 and 85,000,000 shares authorized, 42,969,546 and 42,440,583 shares issued, and 42,485,075 and 41,999,058 shares outstanding respectively	430		424
Additional paid-in capital	726,956		706,857
Treasury stock held, at cost, 484,471 and 441,525 shares, respectively	(12,350)		(9,778)
Retained earnings	281,473		182,652
Accumulated other comprehensive loss, net of income tax	0		(138)
Total Stockholders' Equity	996,509		880,017
Total Liabilities and Stockholders Equity	$ 2,212,469		$ 1,743,916

[1] Amounts are shown net of debt discount