Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
CURRENT ASSETS
Cash and cash equivalents	$ 201,229	$ 184,405
Accounts receivable	43,638	27,476
Assets held for sale	468	21,971
Other current assets	4,295	35,532
Total current assets	249,630	269,384
Oil and natural gas properties, successful efforts method:
Unproved properties	526,270	720,159
Proved oil and gas properties, net	414,482	265,838
Other property and equipment, net	6,748	7,971
Total property and equipment, net	947,500	993,968
OTHER NONCURRENT ASSETS
Other assets	729	2,520
Deferred taxes		540
TOTAL ASSETS	1,197,859	1,266,412
CURRENT LIABILITIES
Accounts payable	44,049	34,717
Accrued capital expenditures	11,083	10,956
Accrued liabilities	64,150	25,462
Accrued interest payable	21,098	23,809
Liabilities held for sale	245	18,898
Total current liabilities	140,625	113,842
NONCURRENT LIABILITIES
Debt, net of unamortized discount and debt issuance costs	492,278	527,248
Asset retirement obligations	4,806	3,401
Other liabilities	13,434	1,367
Total liabilities	651,143	645,858
COMMITMENTS AND CONTINGENCIES
STOCKHOLDERS' EQUITY
Preferred stock, 50,000,000 authorized, no shares issued and outstanding
Common stock, $0.01 par value, 1,000,000,000 authorized, 260,591,893 and 222,674,270 shares issued and outstanding, respectively	2,607	2,227
Additional paid in capital	1,958,731	1,829,082
Treasury stock, shares at cost; 72,704 shares at December 31, 2016	(61)
Accumulated deficit	(1,414,561)	(1,210,755)
Total stockholders' equity	546,716	620,554
TOTAL LIABILITIES AND STOCKHOLDERS' EQUITY	$ 1,197,859	$ 1,266,412