Stockholders Equity (Amounts Reclassified out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		$ 196,892	$ 175,171	$ 513,556	$ 480,260
Interest expense		1,597	2,046	5,383	5,450
Total before income tax benefit		(3,275)	(9,066)	(4,351)	(681)
Income tax benefit		(134)	(1,367)	(458)	1,870
Total reclassifications for the period		(3,141)	(7,699)	(3,893)	(2,551)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period		305	429	1,004	1,055
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		130	386	541	926
Income tax benefit		41	137	178	324
Total reclassifications for the period		89	249	363	602
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		(240)	8	(560)	(194)
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		370	378	1,101	1,120
Reclassification out of Accumulated Other Comprehensive Income | Pension and postretirement plan
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Actuarial loss	[1]	326	273	983	742
Prior-service credit	[1]	(13)	(18)	(42)	(54)
Total before income tax benefit		313	255	941	688
Income tax benefit		97	75	300	235
Total reclassifications for the period		$ 216	$ 180	$ 641	$ 453

[1] These AOCI components are included in the computation of pension and postretirement health care (income) expense. See Note 10 for further discussion.