Condensed Consolidated Statements of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues:
Oil and gas sales	$ 585,229	$ 558,390	$ 601,019
Price-risk management and other, net	(828)	3,096	(3,210)
Total Revenues	584,401	561,486	597,809
Costs and Expenses:
General and administrative, net	45,423	47,097	45,325
Depreciation, depletion, and amortization	252,769	249,344	223,081
Accretion of asset retirement obligation	6,181	5,121	4,570
Lease operating cost	99,731	97,835	89,069
Transportation and gas processing	21,044	19,467	15,722
Severance and other taxes	42,725	47,546	53,351
Interest expense, net	69,382	57,303	35,566
Write-down of oil and gas properties	46,948	0	0
Total Costs and Expenses	584,203	523,713	466,684
Income from Continuing Operations Before Income Taxes	198	37,773	131,125
Provision (Benefit) for Income Taxes	2,640	16,072	49,054
Income from Continuing Operations	(2,442)	21,701	82,071
Income (loss) from Discontinued Operations, net of taxes	0	0	14,211
Net Income (Loss)	$ (2,442)	$ 21,701	$ 96,282
Per Share Amounts-
Basic: Income from Continuing Operations (in dollars per share)	$ (0.06)	$ 0.51	$ 1.94
Income (loss) from Discontinued Operations, Basic, net of taxes (in dollars per share)	$ 0.00	$ 0.00	$ 0.34
Net Income (in dollars per share)	$ (0.06)	$ 0.51	$ 2.27
Diluted: Income from Continuing Operations (in dollars per share)	$ (0.06)	$ 0.50	$ 1.91
Income (loss) from Discontinued Operations, Diluted, net of taxes (in dollars per share)	$ 0.00	$ 0.00	$ 0.33
Net Income (in dollars per share)	$ (0.06)	$ 0.50	$ 2.24
Weighted Average Shares Outstanding - Basic	43,331	42,840	42,394
Weighted Average Shares Outstanding - Diluted	43,331	43,174	42,896