Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
CURRENT ASSETS
Cash and cash equivalents	$ 7,308	$ 12,056
Accounts receivable	60,621	77,402
Assets held for sale	843	1,047
Other current assets	60,739	35,509
Total current assets	129,511	126,014
Oil and natural gas properties, successful efforts method:
Unproved properties	496,817	508,576
Proved oil and gas properties, net	1,259,704	1,251,105
Other property and equipment, net	11,007	11,226
Total property and equipment, net	1,767,528	1,770,907
OTHER NONCURRENT ASSETS
Other assets	6,305	7,616
Operating lease right-of-use assets	34,500	36,975
Assets held for sale	2,907	9,665
TOTAL ASSETS	1,940,751	1,951,177
CURRENT LIABILITIES
Accounts payable	136,491	119,907
Accrued capital expenditures	26,534	43,500
Accrued liabilities	26,455	53,866
Accrued interest payable	11,347	21,308
Liabilities associated with assets held for sale	2,505	2,815
Operating lease liability	12,969	12,666
Total current liabilities	216,301	254,062
NONCURRENT LIABILITIES
Debt, net of unamortized discount and debt issuance costs	501,234	500,541
Revolving credit facility	150,000	130,000
Asset retirement obligations	30,381	29,877
Other liabilities	13,114	8,029
Operating lease liability	21,873	24,569
Liabilities associated with assets held for sale	7,169	7,013
Total liabilities	940,072	954,091
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, 35,804,544 and 35,770,934 shares issued and outstanding, respectively	383	383
Additional paid in capital	2,353,169	2,352,309
Treasury stock, shares at cost; 2,528,440 and 2,508,485 shares, respectively	(10,144)	(10,049)
Accumulated deficit	(1,342,729)	(1,345,557)
Total stockholders’ equity	1,000,679	997,086
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,940,751	$ 1,951,177