Consolidated Balance Sheets (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 24,102	$ 4,128
Accounts receivable, net
Oil and gas sales	16,063	16,027
Joint interest billing	15,978	14,309
Related party	1,478
Other	345	560
Advances to operators	625	487
Fair value of derivative instruments	17,754	17,698
Prepaids and other current assets	10,460	7,123
Total current assets	86,805	60,332
PROPERTY AND EQUIPMENT, NET
Proved oil and gas properties, net	622,548	626,665
Costs not subject to amortization	439,750	352,479
Other property and equipment, net	4,198	3,913
TOTAL PROPERTY AND EQUIPMENT, NET	1,066,496	983,057
DEFERRED FINANCING COSTS, NET	20,539	14,670
INVESTMENTS	2,523	3,392
FAIR VALUE OF DERIVATIVE INSTRUMENTS	4,717	7,257
DEFERRED INCOME TAXES	67,979	72,587
INVENTORY		1,646
OTHER ASSETS	1,566	1,193
TOTAL ASSETS	1,250,625	1,144,134
LIABILITIES AND SHAREHOLDERS' EQUITY
Accounts payable, trade	24,731	33,653
Revenue and royalties payable	32,896	23,864
Current state tax payable		4,052
Accrued drilling costs	51,415	26,884
Accrued interest	7,908	5,953
Other accrued liabilities	20,935	11,838
Advances for joint operations	15,775	3,407
Current maturities of long-term debt		160
Deferred income taxes	5,418	5,286
Other current liabilities	2,082	3,907
Total current liabilities	161,160	119,004
LONG-TERM DEBT, NET OF CURRENT MATURITIES AND DEBT DISCOUNT	607,009	558,094
ASSET RETIREMENT OBLIGATIONS	6,133	6,369
FAIR VALUE OF DERIVATIVE INSTRUMENTS	87	715
OTHER LIABILITIES	3,371	3,316
COMMITMENTS AND CONTINGENCIES
SHAREHOLDERS' EQUITY
Common stock, $0.01 par value (90,000 shares authorized, 39,280 and 38,906 shares issued and outstanding at June 30, 2011 and December 31, 2010, respectively)	393	389
Additional paid-in capital	638,593	630,845
Accumulated deficit	(166,121)	(174,598)
Total shareholders' equity	472,865	456,636
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	$ 1,250,625	$ 1,144,134