Changes in Accumulated Other Comprehensive Income by Component (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (10,698)	$ (11,392)	$ (13,090)
Net sales	1,193,975	1,262,006	1,091,566
Income from continuing operations before income taxes	157,946	166,500	107,574
Tax benefit	(36,566)	(45,959)	(35,253)
Income from continuing operations	121,380	120,541	72,321
Total reclassifications in the period	121,380	118,370	$ 270,527
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications in the period	(17,424)	(7,989)
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	(1,343)	(1,277)
Tax benefit	426	416
Income from continuing operations	(917)	(861)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges | Interest Rate Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	(853)	(886)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges | Foreign Exchange Contracts [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales	(490)	(391)
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	(25,695)	(10,505)
Tax benefit	9,188	3,377
Income from continuing operations	(16,507)	(7,128)
Amortization of prior-service credits, net	259	223
Amortization of actuarial losses	(16,015)	(9,634)
Curtailment gain (net)	0	(223)
Settlement loss	$ (9,939)	$ (871)