Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement [Abstract]
Revenues	$ 141,172	$ 164,550
Cost of revenues	119,991	146,084
Selling, general and administrative expenses	20,911	24,696
Other operating income	(274)	(344)
Operating income (loss)	544	(5,886)
Foreign currency exchange (gain) loss	(332)	1,982
Interest expense, net	2,408	3,201
Loss on extinguishment of debt	790	915
Loss before income taxes	(2,322)	(11,984)
Provision for income taxes	3,040	164
Net loss	$ (5,362)	$ (12,148)
Net loss per common share - basic (in dollars per share)	$ (0.06)	$ (0.14)
Net loss per common share - diluted (in dollars per share)	$ (0.06)	$ (0.14)