Condensed Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Net income	$ 4,749	$ 14,861	$ 19,174	$ 5,359
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	3,577	3,028	12,660	9,865
Change in fair value of derivative instruments, net of tax	(27)	1,545	509	3,022
Foreign currency translation adjustments	4,528	2,196	3,938	(483)
Other comprehensive income, net of tax	8,078	6,769	17,107	12,404
Comprehensive income	$ 12,827	$ 21,630	$ 36,281	$ 17,763