Changes in Accumulated Other Comprehensive Income by Component (Details 2) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (2,804)	$ (3,241)	$ (6,123)	$ (7,598)
Net sales	322,074	267,394	634,173	530,940
Income from continuing operations before income taxes	41,785	32,413	73,356	52,045
Tax benefit	(11,557)	(23,218)	(20,375)	(27,417)
Income from continuing operations	30,228	9,195	52,981	24,628
Income from discontinued operations, net of income taxes	0	200,132	0	198,171
Total reclassifications in the period	30,228	209,327	52,981	222,799
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income from discontinued operations, net of income taxes	0	(4,143)	0	(4,143)
Total reclassifications in the period	(2,375)	(5,690)	(4,043)	(8,391)
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 from continuing operations before income taxes	(264)	31	(459)	116
Tax benefit	92	26	168	38
Income from continuing operations	(172)	57	(291)	154
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	(222)	(212)	(439)	(411)
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	(42)	243	(20)	527
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 from continuing operations before income taxes	(3,058)	(2,019)	(5,419)	(6,391)
Tax benefit	855	415	1,667	1,989
Income from continuing operations	(2,203)	(1,604)	(3,752)	(4,402)
Amortization of prior-service credits, net	61	(14)	101	178
Amortization of actuarial losses	(2,537)	(4,449)	(4,715)	(8,814)
Curtailment gain (net)	0	3,081	(223)	2,882
Settlement loss	(582)	(637)	(582)	(637)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign Currency Items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Tax benefit	0	0	0	0
Income from discontinued operations, net of income taxes	$ 0	$ (4,143)	$ 0	$ (4,143)