Consolidated Statements of Operations (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenues	$ 38,494	$ 60,358
Costs and expenses
Operating costs	30,229	39,333
Selling, general and administrative	3,761	4,545
Severance and merger-related expenses	1,076	1,081
Depreciation and amortization	11,516	11,313
Asset impairment (insurance recoveries), net	16,619	2,018
(Gain) loss on disposition of assets, net	(46)	3,220
Total costs and expenses	63,155	61,510
Operating loss	(24,661)	(1,152)
Interest expense	(3,604)	(3,761)
Loss before income taxes	(28,265)	(4,913)
Income tax benefit	(42)	(2,540)
Net loss	$ (28,223)	$ (2,373)
Loss per share:
Basic and diluted (in dollars per share)	$ (7.53)	$ (0.63)
Weighted average number of common shares outstanding:
Basic and diluted (in shares)	3,750	3,785