Unaudited Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenues:
Revenues	$ 219,694	$ 250,611
Costs and expenses:
Cost of revenues (exclusive of depreciation and amortization expense presented below)	197,602	199,878
Selling, general and administrative expense	26,124	30,108
Depreciation and amortization expense	26,409	31,551
Impairments of goodwill	406,056	0
Impairment of fixed assets	5,198	0
Other operating expense (income), net	107	(86)
Costs and expenses	661,496	261,451
Operating loss	(441,802)	(10,840)
Interest expense, net	(3,504)	(4,752)
Other income, net	774	667
Loss before income taxes	(444,532)	(14,925)
Income tax benefit	39,491	277
Net loss	$ (405,041)	$ (14,648)
Net loss per share:
Basic (in dollars per share)	$ (6.79)	$ (0.25)
Diluted (in dollars per share)	$ (6.79)	$ (0.25)
Weighted average number of common shares outstanding:
Basic (in shares)	59,654	59,258
Diluted (in shares)	59,654	59,258
Products
Revenues:
Revenues	$ 102,980	$ 116,328
Costs and expenses:
Cost of revenues (exclusive of depreciation and amortization expense presented below)	89,746	89,268
Services
Revenues:
Revenues	116,714	134,283
Costs and expenses:
Cost of revenues (exclusive of depreciation and amortization expense presented below)	$ 107,856	$ 110,610