Stockholder's Equity (Amounts Reclassified out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales	$ 133,416	$ 155,545
Interest expense	1,505	2,125
Total before income tax benefit	(3,781)	(1,407)
Income tax benefit	(979)	(380)
Total reclassifications for the period	(2,802)	(1,027)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period	224	444
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	136	284
Income tax benefit	61	99
Total reclassifications for the period	75	185
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	(156)	(85)
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	292	369
Reclassification out of Accumulated Other Comprehensive Income | Pension and postretirement plan
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before income tax benefit	248	367
Income tax benefit	99	108
Total reclassifications for the period	149	259
Actuarial loss	260	381
Prior-service credit	$ (12)	$ (14)