Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period		$ (7,524)	$ (13,948)
Other comprehensive income before reclassifications	(368)	66
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(0.1) million	802	269	802
Net current period other comprehensive income, net of tax	434	335
Accumulated other comprehensive (loss) income	(13,514)	(7,189)	(13,514)
Income tax benefit		(159)	(464)
Unrecognized pension and postretirement benefits
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period		(9,280)	(15,532)
Other comprehensive income before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(0.1) million	802	269
Net current period other comprehensive income, net of tax	802	269
Accumulated other comprehensive (loss) income	(14,730)	(9,011)	(14,730)
Income tax benefit		(159)	(464)
Foreign currency
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period		1,756	1,584
Other comprehensive income before reclassifications	(368)	66
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(0.1) million	0	0
Net current period other comprehensive income, net of tax	(368)	66
Accumulated other comprehensive (loss) income	1,216	1,822	1,216
Income tax benefit		$ 0	$ 0