Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net income (loss)	$ (6,570)	$ 718
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	456	989
Change in fair value of derivative instruments, net of tax	165	(1,858)
Foreign currency translation adjustments, net of tax	1,408	3,205
Other comprehensive income, net of tax	2,029	2,336
Comprehensive income (loss)	$ (4,541)	$ 3,054