Accumulated Other Comprehensive Earnings (Loss) - Reclassification from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other income, net	$ (2,465)	$ (2,239)	$ (4,444)	$ (2,204)
Product cost of goods sold	65,259	65,009	130,675	130,833
Selling, marketing and administrative expenses	26,429	25,618	53,027	49,671
Total before tax	(16,322)	(16,536)	(30,476)	(30,717)
Tax expense (benefit)	4,472	5,462	8,615	9,787
Net earnings	(11,850)	(11,074)	(21,861)	(20,930)
Reclassified from Accumulated OCI into Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total before tax	619	(40)	(868)	166
Tax expense (benefit)	(224)	15	314	(59)
Net earnings	395	(25)	(554)	107
AOCI from Derivatives | Foreign currency forward contracts | Reclassified from Accumulated OCI into Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other income, net	29	420	54	1,026
AOCI from 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	956	(50)	(191)	(43)
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)	(201)	(358)	(402)
Selling, marketing and administrative expenses	$ (187)	$ (209)	$ (373)	$ (419)