Accumulated Other Comprehensive Loss (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	$ (7,524)	$ (13,948)
Other comprehensive income before reclassification	140	(521)
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(0.1) million	121	162
Net current period other comprehensive income, net of tax	261	(359)
Accumulated other comprehensive (loss) income	(7,263)	(14,307)
Income tax benefit	(72)	(96)
Unrecognized pension and postretirement benefits
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(9,280)	(15,532)
Other comprehensive income before reclassification	0	0
Amounts reclassified from accumulated other comprehensive loss, net of tax of $(0.1) million	121	162
Net current period other comprehensive income, net of tax	121	162
Accumulated other comprehensive (loss) income	(9,159)	(15,370)
Income tax benefit	(72)	(96)
Foreign currency
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	1,756	1,584
Other comprehensive income before reclassification	140	(521)
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	140	(521)
Accumulated other comprehensive (loss) income	1,896	1,063
Income tax benefit	$ 0	$ 0