Accumulated Other Comprehensive Earnings (Loss) - Reclassification from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other income, net	$ (4,121)	$ (1,943)	$ (8,565)	$ (4,147)
Product cost of goods sold	114,848	114,748	245,523	245,581
Selling, marketing and administrative expenses	33,095	32,101	86,122	81,772
Total before tax	(38,953)	(41,216)	(69,429)	(71,933)
Tax (expense) benefit	12,066	12,619	20,681	22,406
Net earnings	(26,887)	(28,597)	(48,748)	(49,527)
Reclassified from Accumulated OCI into Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total before tax	(338)	(748)	(1,206)	(582)
Tax (expense) benefit	123	271	437	212
Net earnings	(215)	(477)	(769)	(370)
Foreign Currency Derivatives | Foreign currency forward contracts | Reclassified from Accumulated OCI into Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other income, net	(55)	456	(1)	1,482
Foreign Currency Derivatives | Commodity futures contracts | Reclassified from Accumulated OCI into Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Product cost of goods sold	83	(793)	(108)	(836)
Investments | Reclassified from Accumulated OCI into Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other income, net				4
Postretirement and Pension Benefits | Reclassified from Accumulated OCI into Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Product cost of goods sold	(179)	(202)	(537)	(604)
Selling, marketing and administrative expenses	$ (187)	$ (209)	$ (560)	$ (628)