Accumulated Other Comprehensive Earnings (Loss) - Reclassification from AOCI (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other income, net	$ (3,053)	$ (3,363)	$ (9,070)	$ (3,884)
Cost of goods sold	66,221	67,689	131,332	133,790
Total before tax	(15,568)	(13,731)	(27,343)	(24,094)
Tax (expense) benefit	4,024	3,261	6,888	5,523
Net earnings	(11,544)	(10,470)	(20,455)	(18,571)
Reclassified from Accumulated OCI into Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Total before tax	(218)	217	(503)	173
Tax (expense) benefit	53	(52)	122	(42)
Net earnings	(165)	165	(381)	131
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		(20)		(67)
Foreign Currency Derivatives | Commodity futures contracts | Reclassified from Accumulated OCI into Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Cost of goods sold	$ 162	$ 568	$ 258	$ 902
Type of Cost, Good or Service [Extensible List]	Product [Member]	Product [Member]	Product [Member]	Product [Member]
Postretirement and Pension Benefits | Reclassified from Accumulated OCI into Earnings
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Other income, net	$ (380)	$ (331)	$ (761)	$ (662)