Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Statement of Comprehensive Income [Abstract]
Net income		$ 3,064	$ 6,408	$ 16,318	$ 9,984
Other comprehensive loss, net of tax:
Foreign currency translation adjustment		(1,416)	(371)	(1,038)	(3,132)
Unrealized (loss) gain on cash flow hedges, net of tax expense of $0 for all periods		(151)	207	(1,309)	1,243
Reclassification of pension liability adjustments to earnings, net of tax expense of $0 for all periods	[1]	90	137	275	392
Other comprehensive loss		(1,477)	(27)	(2,072)	(1,497)
Comprehensive income		$ 1,587	$ 6,381	$ 14,246	$ 8,487

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