Changes in Accumulated Other Comprehensive Income by Component (Details 2) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	$ (20,629)	$ (16,841)	$ (14,571)
Net sales	1,491,118	1,495,889	1,436,499
Income before income taxes	206,844	207,495	195,699
Tax benefit	(48,494)	(41,309)	(136,284)
Total reclassifications in the period	158,350	166,186	$ 59,415
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications in the period	(7,873)	(10,827)
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	(609)	(1,393)
Tax benefit	122	310
Income from continuing operations	(487)	(1,083)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest expense	347	(277)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Gains and Losses on Cash Flow Hedges | Foreign exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net sales	(956)	(1,116)
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	(9,671)	(12,769)
Tax benefit	2,285	3,025
Income from continuing operations	(7,386)	(9,744)
Amortization of prior-service credits, net	(429)	(580)
Amortization of actuarial losses	(8,902)	(12,189)
Settlement loss	$ (340)	$ 0