CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 1	$ 0
Accounts receivable, net of allowance for doubtful accounts of $2,303 at March 31, 2020 and $1,103 at December 31, 2019	48,602	71,867
Derivative instruments	169,859	9,166
Other current assets	19,730	19,399
Total current assets	238,192	100,432
Noncurrent assets:
Oil and natural gas properties	1,357,496	1,675,717
Accumulated depletion and amortization	(146,158)	(209,105)
Total oil and natural gas properties, net	1,211,338	1,466,612
Other property and equipment	109,094	135,117
Accumulated depreciation	(24,819)	(25,462)
Total other property and equipment, net	84,275	109,655
Derivative instruments	15,245	525
Other noncurrent assets	10,480	12,974
Total assets	1,559,530	1,690,198
Current liabilities:
Accounts payable and accrued expenses	108,720	151,811
Derivative instruments	0	4,817
Total current liabilities	108,720	156,628
Noncurrent liabilities:
Long-term debt	403,663	394,319
Derivative instruments	283	141
Deferred income taxes	35,404	9,057
Asset retirement obligation	134,877	124,019
Other noncurrent liabilities	26,757	33,586
Commitments and Contingencies - Note 4
Equity:
Common stock ($.001 par value; 750,000,000 shares authorized; 84,863,263 and 84,655,222 shares issued; and 79,751,017 and 79,542,976 shares outstanding, at March 31, 2020 and December 31, 2019, respectively)	85	85
Additional paid-in-capital	904,072	901,830
Treasury stock, at cost, (5,112,246 shares at March 31, 2020 and at December 31, 2019)	(49,995)	(49,995)
Retained earnings (deficit)	(4,336)	120,528
Total equity	849,826	972,448
Total liabilities and equity	$ 1,559,530	$ 1,690,198