Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2015
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance	$ (3,986)	$ (2,652)
Other comprehensive income before reclassifications	(2,254)	(4,052)
Amounts reclassified from accumulated other comprehensive income	385	849
Other comprehensive income, net	(1,869)	(3,203)
Ending balance	(5,855)	(5,855)
Foreign Currency Translation Adjustments [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance	(2,471)	(219)
Other comprehensive income before reclassifications	(2,201)	(4,453)
Amounts reclassified from accumulated other comprehensive income	0	0
Other comprehensive income, net	(2,201)	(4,453)
Ending balance	(4,672)	(4,672)
Unrecognized Pension and Postretirement Benefit Costs (Credit) [Member]
Changes in accumulated other comprehensive income [Roll Forward]
Beginning balance	(1,515)	(2,433)
Other comprehensive income before reclassifications	(53)	401
Amounts reclassified from accumulated other comprehensive income	385	849
Other comprehensive income, net	332	1,250
Ending balance	$ (1,183)	$ (1,183)