Derivatives Derivative Instruments, Gain (Loss) Table (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	$ (94)	$ 36	$ 0
Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	1	(946)	(768)
Foreign currency hedges
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments Not Designated as Hedging Instruments, Loss	(15)	$ (5)
Foreign currency hedges | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI		-12
Loss on Cash Flow Hedge Ineffectiveness	(1)	$ (1)
Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net	38	(18)
Foreign currency hedges | Net sales | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	(488)	(124)
Foreign currency hedges | Cost of Goods Sold | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	497	111
Foreign currency hedges | Selling, General and Administrative Expenses | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ 45	1
Foreign currency hedges | Other Expense [Member] | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Income Statement Location of Gain (Loss) Reclassified from Accumulated OCI	54
Interest Rate Swap | Interest Expense | Cash Flow Hedge
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss) on Derivative, Net	$ (37)	$ (928)	$ (768)