Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income		$ 4,971	$ 3,222	$ 7,889	$ 3,824
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment		(371)	2,412	(3,132)	5,528
Unrealized gain (loss) on cash flow hedges, net of tax expense of $0 for all periods		207	82	1,243	(119)
Reclassification of pension liability adjustments to earnings, net of tax expense of $0 for all periods	[1]	137	114	392	335
Other comprehensive (loss) income		(27)	2,608	(1,497)	5,744
Comprehensive income		$ 4,944	$ 5,830	$ 6,392	$ 9,568

[1] Reclassifications out of accumulated other comprehensive loss for pension obligations are charged to selling and administrative expenses.