Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Statement of Comprehensive Income [Abstract]
Net income	$ 628	$ 2,563
Other comprehensive income (loss):
Foreign currency exchange translation adjustments	1,822	305
Minimum pension liability, net of tax	(740)	109
Other comprehensive income	1,082	414
Comprehensive income	$ 1,710	$ 2,977