Condensed Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Net income (loss)	$ 14,394	$ (25,168)	$ 17,506	$ (28,552)
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	7,709	2,084	12,421	3,433
Change in fair value of derivative instruments, net of tax	572	(412)	330	(274)
Foreign currency translation adjustments	2,181	(785)	(8,309)	(1,373)
Other comprehensive income, net of tax	10,462	887	4,442	1,786
Comprehensive income (loss)	$ 24,856	$ (24,281)	$ 21,948	$ (26,766)