Changes in Accumulated Other Comprehensive Income (Loss) by Component (Details 2) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (2,637)	$ (2,435)	$ (7,944)	$ (8,558)
Net sales	291,434	317,659	906,949	951,832
Income from continuing operations before income taxes	41,655	47,709	130,575	121,065
Tax benefit	(7,984)	(13,407)	(33,601)	(33,782)
Income from continuing operations	33,671	34,302	96,974	87,283
Total reclassifications in the period	33,671	33,877	96,974	86,858
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications in the period	(2,776)	(2,137)	(8,423)	(6,181)
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	(351)	(463)	(1,141)	(922)
Tax benefit	110	136	349	304
Income from continuing operations	(241)	(327)	(792)	(618)
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)	(224)	(642)	(663)
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	(137)	(239)	(499)	(259)
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	(3,918)	(2,624)	(11,781)	(8,044)
Tax benefit	1,383	814	4,150	2,481
Income from continuing operations	(2,535)	(1,810)	(7,631)	(5,563)
Amortization of prior-service credits, net	65	66	192	167
Amortization of actuarial losses	(3,983)	(2,409)	(11,973)	(7,125)
Curtailment loss			0	(223)
Settlement loss	$ 0	$ (281)	$ 0	$ (863)