Condensed Consolidated Statements of Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Net income (loss)	$ (25,168)	$ 12,436	$ (28,552)	$ 14,425
Other comprehensive income (loss):
Pension and other postretirement benefit adjustments, net of tax	2,084	6,412	3,433	9,083
Change in fair value of derivative instruments, net of tax	(412)	(509)	(274)	536
Foreign currency translation adjustments	(785)	2,335	(1,373)	(590)
Other comprehensive income, net of tax	887	8,238	1,786	9,029
Comprehensive income (loss)	$ (24,281)	$ 20,674	$ (26,766)	$ 23,454