Consolidated Statements of Operations - USD ($) shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues:
Revenues	$ 1,017,354,000	$ 1,088,133,000	$ 670,627,000
Costs and expenses:
Cost of revenues (exclusive of depreciation and amortization expense presented below)	802,589,000	834,513,000	520,755,000
Selling, general and administrative expenses	122,932,000	138,070,000	114,816,000
Depreciation and amortization expense	123,319,000	123,530,000	107,667,000
Impairment of goodwill	165,000,000	0	0
Impairment of fixed assets	33,697,000	0	0
Other operating (income) expense, net	(2,003,000)	(2,104,000)	1,261,000
Operating Expenses	1,245,534,000	1,094,009,000	744,499,000
Operating loss	(228,180,000)	(5,876,000)	(73,872,000)
Interest expense	(17,898,000)	(19,314,000)	(4,674,000)
Interest income	262,000	319,000	359,000
Other income, net	5,089,000	3,139,000	775,000
Loss before income taxes	(240,727,000)	(21,732,000)	(77,412,000)
Income tax (provision) benefit	8,919,000	2,627,000	(7,438,000)
Net loss	$ (231,808,000)	$ (19,105,000)	$ (84,850,000)
Net loss per share:
Basic (in dollars per share)	$ (3.90)	$ (0.33)	$ (1.69)
Diluted (in dollars per share)	$ (3.90)	$ (0.33)	$ (1.69)
Weighted average number of common shares outstanding:
Basic (in shares)	59,379	58,712	50,139
Diluted (in shares)	59,379	58,712	50,139
Products
Revenues:
Revenues	$ 483,359,000	$ 501,822,000	$ 303,802,000
Costs and expenses:
Cost of revenues (exclusive of depreciation and amortization expense presented below)	369,194,000	366,453,000	219,466,000
Service
Revenues:
Revenues	533,995,000	586,311,000	366,825,000
Costs and expenses:
Cost of revenues (exclusive of depreciation and amortization expense presented below)	$ 433,395,000	$ 468,060,000	$ 301,289,000