Consolidated Statements of Comprehensive Income (loss) (unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net income (loss)	$ (14,096)	$ 8,151
Other comprehensive income (loss), net of tax:
Currency translation adjustments (net of income tax of $0 in 2019 and 2018)	(4,207)	8,921
Change in unrecognized net periodic pension costs (net of income tax of $69 in 2019 and $142 in 2018)	197	380
Total other comprehensive income (loss), net of tax	(6,423)	9,307
Comprehensive income (loss)	(20,519)	17,458
Parent
Other comprehensive income (loss), net of tax:
Net unrealized gain (loss) on derivative instruments and other (net of income tax of $658 in 2019 and $0 in 2018)	$ (2,413)	$ 6