Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	$ (12,780)	$ (11,856)
Other comprehensive income (loss) before reclassifications	577	(696)
Amounts reclassified from accumulated other comprehensive loss, net of tax	96	131
Net current period other comprehensive income, net of tax	673	(565)
Accumulated other comprehensive loss	(12,107)	(12,421)
Income tax benefit	(55)	(73)
Unrecognized pension and postretirement benefits
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(11,968)	(11,891)
Other comprehensive income (loss) before reclassifications	0	0
Amounts reclassified from accumulated other comprehensive loss, net of tax	96	131
Net current period other comprehensive income, net of tax	96	131
Accumulated other comprehensive loss	(11,872)	(11,760)
Income tax benefit	(55)	(73)
Foreign currency
Accumulated Other Comprehensive Income [Roll Forward]
Balance at beginning of period	(812)	35
Other comprehensive income (loss) before reclassifications	577	(696)
Amounts reclassified from accumulated other comprehensive loss, net of tax	0	0
Net current period other comprehensive income, net of tax	577	(696)
Accumulated other comprehensive loss	(235)	(661)
Income tax benefit	$ 0	$ 0