Changes in Accumulated Other Comprehensive Income by Component (Details 2) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (2,586)	$ (2,804)	$ (5,306)	$ (6,123)
Net sales	314,941	322,074	615,515	634,173
Income before income taxes	47,826	41,785	88,920	73,356
Tax benefit	(13,599)	(11,557)	(25,617)	(20,375)
Total reclassifications in the period	34,227	30,228	63,303	52,981
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications in the period	(3,039)	(2,375)	(5,646)	(4,043)
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	(330)	(264)	(789)	(459)
Tax benefit	106	92	239	168
Income from continuing operations	(224)	(172)	(550)	(291)
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	(214)	(222)	(429)	(439)
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	(116)	(42)	(360)	(20)
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	(4,236)	(3,058)	(7,863)	(5,419)
Tax benefit	1,421	855	2,767	1,667
Income from continuing operations	(2,815)	(2,203)	(5,096)	(3,752)
Amortization of prior-service credits, net	64	61	127	101
Amortization of actuarial losses	(4,300)	(2,537)	(7,990)	(4,715)
Curtailment loss			0	(223)
Settlement loss	$ 0	$ (582)	$ 0	$ (582)