CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
CONSOLIDATED STATEMENTS OF OPERATIONS
Revenues	$ 182,610	$ 243,777
Cost of revenues (exclusive of items shown below)	146,223	181,944
Selling, general and administrative expenses	30,595	36,530
Impairment and other charges	0	205,536
Depreciation and amortization	17,773	39,293
Gain on disposition of assets, net	(1,460)	(819)
Operating loss	(10,521)	(218,707)
Interest expense	(380)	(113)
Interest income	18	334
Other income (expense), net	507	(308)
Loss before income taxes	(10,376)	(218,794)
Income tax benefit	(714)	(58,371)
Net loss	$ (9,662)	$ (160,423)
Loss per share
Basic (in dollars per share)	$ (0.05)	$ (0.76)
Diluted (in dollars per share)	$ (0.05)	$ (0.76)