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	$ 588,541	$ 554,194	$ 602,341
Price-risk management and other, net	(828)	3,096	(3,210)
Total Revenues	587,713	557,290	599,131
Costs and Expenses:
General and administrative, net	45,802	46,778	45,362
Depreciation, depletion, and amortization	252,043	247,178	221,230
Accretion of asset retirement obligation	6,181	5,121	4,570
Lease operating cost	101,611	97,295	89,069
Transportation and gas processing	22,336	18,175	15,722
Severance and other taxes	42,252	48,862	52,508
Interest expense, net	69,382	57,303	35,566
Write-down of oil and gas properties	73,911	0	0
Total Costs and Expenses	613,518	520,712	464,027
Income from Continuing Operations Before Income Taxes	(25,805)	36,578	135,104
Provision (Benefit) for Income Taxes	(6,773)	15,639	50,494
Income from Continuing Operations	(19,032)	20,939	84,610
Income (loss) from Discontinued Operations, net of taxes	0	0	14,211
Net Income (Loss)	$ (19,032)	$ 20,939	$ 98,821
Per Share Amounts-
Basic: Income from Continuing Operations (in dollars per share)	$ (0.44)	$ 0.49	$ 2.00
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)	$ (0.44)	$ 0.49	$ 2.33
Diluted: Income from Continuing Operations (in dollars per share)	$ (0.44)	$ 0.48	$ 1.97
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)	$ (0.44)	$ 0.48	$ 2.30
Weighted Average Shares Outstanding - Basic	43,331	42,840	42,394
Weighted Average Shares Outstanding - Diluted	43,331	43,174	42,896