CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
CURRENT ASSETS:
Cash and cash equivalents	$ 151,037	$ 11,557
Accounts receivable:
Oil and gas sales	67,338	69,161
Joint interest billing	19,484	42,407
Other	16,758	22,193
Commodity derivative contracts	35,858	126,709
Other current assets	2,388	1,098
Total current assets	292,863	273,125
PROPERTY AND EQUIPMENT:
Oil and gas properties, on the basis of full cost accounting	3,558,960	3,442,681
Other property and equipment	14,734	13,454
Less accumulated depreciation, depletion, amortization and impairment	(2,119,458)	(1,333,019)
Net property and equipment	1,454,236	2,123,116
OTHER ASSETS:
Deferred income taxes	9,579	35,821
Other noncurrent assets	39,560	43,731
Total other assets	49,139	79,552
TOTAL	1,796,238	2,475,793
CURRENT LIABILITIES:
Accounts payable	8,818	22,783
Accrued liabilities	155,221	183,831
Commodity derivative contracts	1,867
Deferred income taxes	9,579	44,862
Total current liabilities	175,485	251,476
LONG-TERM LIABILITIES:
Asset retirement obligations	17,737	21,599
Long-term debt	1,924,412	1,735,150
Other long-term liabilities	1,401	1,706
Total long-term liabilities	$ 1,943,550	$ 1,758,455
COMMITMENTS AND CONTINGENCIES (Note 15)
STOCKHOLDERS' EQUITY (DEFICIT)
Preferred stock
Common stock, $0.01 par value, 100,000,000 shares authorized; 7,257,007 shares issued and 7,164,968 shares outstanding at June 30, 2015 and 7,049,173 shares issued and 6,995,705 shares outstanding at December 31, 2014	$ 73	$ 70
Treasury stock	(3,021)	(2,592)
Additional paid-in-capital	886,284	882,528
Retained deficit	(1,206,136)	(414,147)
Total stockholders' (deficit) equity	(322,797)	465,862
TOTAL	1,796,238	2,475,793
Series A Preferred Stock
STOCKHOLDERS' EQUITY (DEFICIT)
Preferred stock	3	3
Total stockholders' (deficit) equity	$ 3	$ 3