Changes in Accumulated Other Comprehensive Income by Component (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (2,720)	$ (3,319)
Net sales	300,573	312,099
Income before income taxes	41,094	31,571
Tax benefit	(12,018)	(8,819)
Total reclassifications in the period	29,076	22,752
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications in the period	(2,644)	(1,668)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(440)	(195)
Tax benefit	127	76
Income from continuing operations	(313)	(119)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges | Interest Rate Contract [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(196)	(217)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges | Foreign Exchange Contract [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales	(244)	22
Reclassification out of Accumulated Other Comprehensive Income [Member] | Pension and Other Postretirement Benefit Items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before income taxes	(3,627)	(2,361)
Tax benefit	1,296	812
Income from continuing operations	(2,331)	(1,549)
Amortization of prior-service credits, net	63	40
Amortization of actuarial losses	(3,690)	(2,178)
Curtailment loss	$ 0	$ (223)