Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Net loss	$ (4,542)	$ (2,961)
Other comprehensive income (loss):
Pension and other post-retirement benefit adjustments, net of tax	777	755
Change in fair value of derivative instruments, net of tax	(3,054)	1,470
Foreign currency translation adjustments, net of tax	(26)	4,333
Other comprehensive income (loss), net of tax	(2,303)	6,558
Comprehensive income (loss)	$ (6,845)	$ 3,597