Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Current assets
Cash and cash equivalents	$ 2,004	$ 10,838
Accounts receivable, net	81,182	92,946
Derivative Asset, Current	114,182	171,101
Other current assets	4,096	3,736
Total current assets	201,464	278,621
Oil and gas properties, full cost method
Proved properties, net	2,312,047	2,086,727
Unproved properties, not being amortized	504,646	535,197
Other property and equipment, net	7,752	7,329
Total property and equipment, net	2,824,445	2,629,253
Derivative Asset, Noncurrent	20,171	43,684
Debt issuance costs	26,342	25,403
Other assets	5,328	4,515
Total Assets	3,077,750	2,981,476
Current liabilities
Accounts payable	81,486	106,819
Revenues and royalties payable	58,687	66,954
Accrued capital expenditures	75,448	106,149
Accrued interest	20,412	21,149
Liabilities of discontinued operations	4,412	4,405
Deferred Tax Liabilities, Net, Current	39,760	61,258
Other current liabilities	60,861	57,570
Total current liabilities	341,066	424,304
Long-term debt	1,372,785	1,351,346
Liabilities of discontinued operations	3,900	8,394
Deferred income taxes	62,112	77,349
Asset retirement obligations	13,862	12,187
Other liabilities	4,012	4,455
Liabilities	$ 1,797,737	$ 1,878,035
Commitments and contingencies
Shareholders’ equity
Common stock, $0.01 par value, 90,000,000 shares authorized; 51,961,981 issued and outstanding as of June 30, 2015 and 46,127,924 issued and outstanding as of December 31, 2014	$ 520	$ 461
Additional paid-in capital	1,159,291	915,436
Retained earnings	120,202	187,544
Total shareholders’ equity	1,280,013	1,103,441
Total Liabilities and Shareholders’ Equity	$ 3,077,750	$ 2,981,476