Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Income Statement [Abstract]
Revenues	$ 164,550	$ 211,473
Cost of revenues	146,084	174,976
Selling, general and administrative expenses	24,696	30,742
Other operating (income) loss, net	(344)	76
Operating income (loss)	(5,886)	5,679
Foreign currency exchange (gain) loss	1,982	(1,062)
Interest expense, net	3,201	3,656
Loss on extinguishment of debt	915	0
Income (loss) before income taxes	(11,984)	3,085
Provision for income taxes	164	1,803
Net income (loss)	$ (12,148)	$ 1,282
Net income (loss) per common share - basic (in dollars per share)	$ (0.14)	$ 0.01
Net income (loss) per common share - diluted (in dollars per share)	$ (0.14)	$ 0.01