Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income		$ 4,940	$ 3,024	$ 2,918	$ 602
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustment		(2,785)	2,228	(2,761)	3,116
Unrealized gain (loss) on cash flow hedges, net of tax expense of $0 for all periods		298	(202)	1,036	(201)
Reclassification of pension liability adjustments to earnings, net of tax expense of $0 for all periods	[1]	141	112	255	221
Other comprehensive (loss) income		(2,346)	2,138	(1,470)	3,136
Comprehensive income		$ 2,594	$ 5,162	$ 1,448	$ 3,738

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