Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:
Oil and gas sales	$ 158,487	$ 142,503	$ 307,544	$ 289,034
Price-risk management and other, net	(2,493)	1,574	(7,370)	1,334
Total Revenues	155,994	144,077	300,174	290,368
Costs and Expenses:
General and administrative, net	12,058	11,191	22,584	23,916
Depreciation, depletion, and amortization	73,090	59,773	135,741	120,229
Accretion of asset retirement obligation	1,415	1,479	2,801	3,254
Lease operating cost	23,572	26,957	48,539	53,841
Transportation and gas processing	6,013	4,865	11,305	9,603
Severance and other taxes	9,436	10,501	18,638	20,526
Interest expense, net	18,649	17,000	37,098	33,802
Total Costs and Expenses	144,233	131,766	276,706	265,171
Income Before Income Taxes	11,761	12,311	23,468	25,197
Provision for Income Taxes	4,934	4,762	11,199	9,610
Net Income	$ 6,827	$ 7,549	$ 12,269	$ 15,587
Per Share Amounts-
Earnings Per Share (Basic)	$ 0.16	$ 0.17	$ 0.28	$ 0.36
Earnings Per Share (Diluted)	$ 0.15	$ 0.17	$ 0.28	$ 0.36
Weighted Average Shares Outstanding - Basic	43,826	43,369	43,727	43,268
Weighted Average Shares Outstanding - Diluted	44,312	43,612	44,215	43,599