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	$ 158,214	$ 140,892	$ 306,772	$ 287,369
Price-risk management and other, net	(2,493)	1,574	(7,370)	1,334
Total Revenues	155,721	142,466	299,402	288,703
Costs and Expenses:
General and administrative, net	12,412	11,191	23,151	23,916
Depreciation, depletion, and amortization	72,205	59,458	133,890	119,578
Accretion of asset retirement obligation	1,415	1,479	2,801	3,254
Lease operating cost	21,932	26,957	47,199	54,381
Transportation and gas processing	6,013	4,865	11,305	10,895
Severance and other taxes	9,436	10,501	18,638	20,276
Interest expense, net	18,649	17,000	37,098	33,802
Total Costs and Expenses	142,062	131,451	274,082	266,102
Income Before Income Taxes	13,659	11,015	25,320	22,601
Provision for Income Taxes	5,621	4,293	11,869	8,670
Net Income	$ 8,038	$ 6,722	$ 13,451	$ 13,931
Per Share Amounts-
Earnings Per Share (Basic)	$ 0.18	$ 0.15	$ 0.31	$ 0.32
Earnings Per Share (Diluted)	$ 0.18	$ 0.15	$ 0.30	$ 0.32
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