Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net income (loss)	$ 3,887	$ (17,326)
Adjustments to reconcile net income (loss) to net cash provided by operating activities
Deferred tax expense (benefit)	349	(988)
Depreciation, depletion and amortization	12,871	15,230
Ceiling test write-downs	0	20,111
Accretion of asset retirement obligation	332	500
Share based compensation expense	556	1,923
Amortization costs and other	200	198
Non-cash derivative expense	437	0
Payments to settle asset retirement obligations	(72)	(782)
Changes in working capital accounts:
Revenue receivable	2,592	734
Prepaid drilling and pipe costs	778	2,317
Joint interest billing receivable	6,331	(6,121)
Accounts payable and accrued liabilities	(27,344)	10,502
Advances from co-owners	10,742	(12,619)
Other	(2,539)	272
Net cash provided by operating activities	9,120	13,951
Cash flows used in investing activities:
Investment in oil and gas properties	(31,275)	(33,396)
Payments to Acquire Property, Plant, and Equipment	(49)	0
Sale of oil and gas properties	19,652	0
Net cash used in investing activities	(11,672)	(33,396)
Cash flows used in financing activities:
Net payments for share based compensation	(234)	(390)
Sale of common stock under ESPP	150	0
Deferred financing costs	(21)	(1)
Payment of preferred stock dividend	(1,284)	(1,284)
Proceeds from bank borrowings	25,000	30,000
Repayment of bank borrowings	(15,000)	(20,000)
Net cash provided by (used in) financing activities	8,611	8,325
Net decrease in cash and cash equivalents	6,059	(11,120)
Cash and cash equivalents, beginning of period	14,904	22,263
Cash and cash equivalents, end of period	20,963	11,143
Cash paid during the period for:
Interest	7,845	7,619
Income taxes	$ 41	$ 15