Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2019	Mar. 31, 2018
Statement of Comprehensive Income [Abstract]
Net income (loss)		$ 3,690	$ (1,858)
Other comprehensive income, net of tax:
Foreign currency translation adjustment		1,053	24
Unrealized (loss) gain on cash flow hedges, net of tax expense of $0 for all periods		(26)	738
Reclassification of pension liability adjustments to earnings, net of tax expense of $0 for all periods	[1]	93	114
Other comprehensive income		1,120	876
Comprehensive income (loss)		$ 4,810	$ (982)

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