Condensed Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating Income (Loss) [Abstract]
Revenues	$ 158,691	$ 114,544
Cost of revenues	129,590	111,573
Selling, general and administrative expenses	25,397	23,492
Other operating income, net	(42)	(1,696)
Operating income (loss)	3,746	(18,825)
Foreign currency exchange loss (gain)	392	(455)
Interest expense, net	3,218	2,081
Gain on extinguishment of debt	0	(1,894)
Income (loss) from operations before income taxes	136	(18,557)
Provision (benefit) for income taxes	1,119	(5,257)
Net loss	$ (983)	$ (13,300)
Loss per common share - basic (in dollars per share)	$ (0.01)	$ (0.16)
Loss per common share - diluted (in dollars per share)	$ (0.01)	$ (0.16)