Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
CURRENT ASSETS
Cash and cash equivalents	$ 9,221	$ 12,056
Accounts receivable	59,804	77,402
Assets held for sale	1,115	1,047
Other current assets	36,609	35,509
Total current assets	106,749	126,014
Oil and natural gas properties, successful efforts method:
Unproved properties	487,066	508,576
Proved oil and gas properties, net	1,248,999	1,251,105
Other property and equipment, net	10,638	11,226
Total property and equipment, net	1,746,703	1,770,907
OTHER NONCURRENT ASSETS
Other assets	5,688	7,616
Operating lease right-of-use assets	33,692	36,975
Assets held for sale	3,430	9,665
TOTAL ASSETS	1,896,262	1,951,177
CURRENT LIABILITIES
Accounts payable	133,741	119,907
Accrued capital expenditures	19,510	43,500
Accrued liabilities	29,283	53,866
Accrued interest payable	22,282	21,308
Liabilities associated with assets held for sale	4,052	2,815
Operating lease liability	13,826	12,666
Total current liabilities	222,694	254,062
NONCURRENT LIABILITIES
Debt, net of unamortized discount and debt issuance costs	501,928	500,541
Revolving credit facility	160,000	130,000
Asset retirement obligations	29,952	29,877
Other liabilities	21,240	8,029
Operating lease liability	20,247	24,569
Liabilities associated with assets held for sale	6,978	7,013
Total liabilities	963,039	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, 36,034,837 and 35,770,934 shares issued and outstanding, respectively	386	383
Additional paid in capital	2,354,929	2,352,309
Treasury stock, shares at cost; 2,600,672 and 2,508,485 shares, respectively	(10,511)	(10,049)
Accumulated deficit	(1,411,581)	(1,345,557)
Total stockholders’ equity	933,223	997,086
TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY	$ 1,896,262	$ 1,951,177