Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 374	$ 1,844
Accounts receivable	50,942	45,154
Deferred income taxes	12,411	11,954
Derivative instruments	3,444	4,745
Prepaid expenses and other current assets	1,537	1,596
Total current assets	68,708	65,293
Oil and gas properties, full cost method of accounting
Unproved	58,248	37,235
Proved	739,163	689,021
Other property and equipment	3,184	2,869
Accumulated depletion, depreciation and amortization	(83,706)	(57,564)
Net property and equipment	716,889	671,561
Other assets:
Restricted cash	16,601	14,781
Derivative instruments	2,435	3,098
Deferred financing costs	2,899	3,281
Other assets	1,274	2,509
Total assets	808,806	760,523
Current liabilities:
Accounts payable and accrued expenses	70,459	58,144
Asset retirement obligations	2,843	3,072
Derivative instruments	31,398	31,193
Total current liabilities	104,700	92,409
Long term liabilities:
Long term debt	66,500	127,900
Asset retirement obligations	11,079	11,693
Derivative instruments	56,724	51,279
Deferred income taxes	79,034	73,376
Total liabilities	318,037	356,657
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value; 1,000,000 shares authorized; none issued or outstanding	0	0
Common stock, $0.0001 par value; 225,000,000 shares authorized; issued and outstanding 60,972,486 and 54,717,571 shares at June 30, 2011 and December 31, 2010, respectively	6	5
Additional paid-in capital	514,802	436,794
Accumulated deficit	(24,039)	(32,933)
Total stockholders' equity	490,769	403,866
Total liabilities and stockholders' equity	$ 808,806	$ 760,523