Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Net loss	$ (7,956)	$ (93,368)
Other comprehensive income (loss):
Pension and other post-retirement benefit adjustments, net of tax	1,041	7,514
Change in fair value of derivative instruments, net of tax	(2,942)	866
Foreign currency translation adjustments, net of tax	(7,057)	11,645
Other comprehensive income (loss), net of tax	(8,958)	20,025
Comprehensive income (loss)	$ (16,914)	$ (73,343)