Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Net income (loss)	$ (3,384)	$ 1,989
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	1,349	2,671
Change in fair value of derivative instruments, net of tax	138	1,045
Foreign currency translation adjustments	(588)	(2,925)
Other comprehensive income, net of tax	899	791
Comprehensive income (loss)	$ (2,485)	$ 2,780