Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2017	Dec. 31, 2016
Current assets
Cash and cash equivalents	$ 2,391	$ 4,194
Accounts receivable, net	67,257	64,208
Derivative assets, current	1,036	1,237
Other current assets	2,542	3,349
Total current assets	73,226	72,988
Oil and gas properties, full cost method
Proved properties, net	1,371,335	1,294,667
Unproved properties, not being amortized	253,270	240,961
Other property and equipment, net	9,599	10,132
Total property and equipment, net	1,634,204	1,545,760
Deferred income tax assets, noncurrent	0	0
Derivative assets, noncurrent	0	0
Other assets	7,010	7,579
Total Assets	1,714,440	1,626,327
Current liabilities
Accounts payable	51,968	55,631
Revenues and royalties payable	44,038	38,107
Accrued capital expenditures	69,040	36,594
Accrued interest	20,957	22,016
Accrued Lease Operating Expense	11,919	12,377
Derivative liabilities	7,456	22,601
Deferred income tax liabilities, current	0	0
Other current liabilities	22,650	24,633
Total current liabilities	228,028	211,959
Long-term debt	1,362,046	1,325,418
Asset retirement obligations	21,737	20,848
Derivative liabilities, noncurrent	18,675	27,528
Other liabilities	14,027	17,116
Liabilities	1,644,513	1,602,869
Commitments and contingencies
Shareholders’ equity
Common stock, $0.01 par value, 90,000,000 shares authorized; 65,796,342 issued and outstanding as of March 31, 2017 and 65,132,499 issued and outstanding as of December 31, 2016	658	651
Additional paid-in capital	1,672,332	1,665,891
Accumulated deficit	(1,603,063)	(1,643,084)
Total shareholders’ equity	69,927	23,458
Total Liabilities and Shareholders’ Equity	$ 1,714,440	$ 1,626,327