Stockholder's Equity (Amounts Reclassified out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ (137,478)	$ (161,119)	$ (270,894)	$ (316,664)
Interest expense	1,470	1,661	2,975	3,786
Total before income tax benefit	(1,677)	331	(5,458)	(1,076)
Income tax benefit	(1,439)	(56)	(460)	324
Total reclassifications for the period	(3,116)	275	(5,918)	(752)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period	186	255	410	699
Reclassification out of Accumulated Other Comprehensive Income | Loss (gain) on cash flow hedging
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before income tax benefit	77	127	213	411
Income tax benefit	(44)	(38)	(105)	(137)
Total reclassifications for the period	33	89	108	274
Reclassification out of Accumulated Other Comprehensive Income | Loss (gain) on cash flow hedging | Foreign exchange contracts
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	(210)	(235)	(366)	(320)
Reclassification out of Accumulated Other Comprehensive Income | Loss (gain) on cash flow hedging | Interest rate contracts
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	287	362	579	731
Reclassification out of Accumulated Other Comprehensive Income | Pension and postretirement plan
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Actuarial loss	249	276	509	657
Prior-service credit	(12)	(15)	(24)	(29)
Total before income tax benefit	237	261	485	628
Income tax benefit	(84)	(95)	(183)	(203)
Total reclassifications for the period	$ 153	$ 166	$ 302	$ 425