Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
OPERATING ACTIVITIES:
Net income (loss)	$ (975)	$ 5,147
Adjustments to reconcile net income (loss) to net cash provided by operating activities-
Depreciation and amortization	10,469	13,605
Amortization of deferred loan costs	2,990	1,044
Non-cash interest	362	1,543
Accretion expense	814	836
Unrealized (gain) loss on commodity derivatives, net of premium amortization	5,474	(2,997)
Unrealized loss on interest rate derivatives	418
Deferred income tax provision (benefit)	(1,953)	268
Share-based compensation	1,355	1,471
Gain on disposal of other property and equipment	(22)	(41)
Other income		(550)
Changes in operating assets and liabilities-
Accounts receivable	49	3,237
Prepaid expenses, inventory and other assets	(208)	657
Derivative premiums	(111)	(2,866)
Accounts payable and proceeds due others	(3,553)	1,028
Accrued liabilities and other	(1,459)	(1,004)
Income taxes payable	(365)	(177)
Asset retirement obligations	(242)
Total adjustments	14,018	16,054
Net cash provided by operating activities	13,043	21,201
INVESTING ACTIVITIES:
Payments for oil and natural gas properties and equipment	(13,500)	(18,666)
Proceeds from sales of oil and natural gas properties	462	478
Payments for other property and equipment	(469)	(358)
Proceeds from sales of other property and equipment	11	4
Net cash used in investing activities	(13,496)	(18,542)
FINANCING ACTIVITIES:
Payments on long-term debt	(223,185)	(24,576)
Proceeds from borrowings on long-term debt	231,166	22,132
Payments for deferred loan costs	(7,003)
Stock repurchased	(108)	(326)
Net cash provided by (used in) financing activities	870	(2,770)
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	417	(111)
CASH AND CASH EQUIVALENTS, beginning of period	37	129
CASH AND CASH EQUIVALENTS, end of period	454	18
SUPPLEMENTAL CASH FLOW INFORMATION:
Cash paid for income taxes	481	565
Cash paid for interest	8,706	9,107
DISCLOSURE OF NON CASH INVESTING AND FINANCING ACTIVITIES:
Asset retirement obligations	$ (129)	$ 118