Restructuring and Exit Costs (Narrative) (Details) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended	15 Months Ended
	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($) ft²	Jun. 30, 2016 USD ($)	Jun. 30, 2015 USD ($) ft²	Dec. 31, 2015 USD ($)	Jun. 30, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs	$ 109	$ 2,340	$ 297	$ 2,340
2015 Consolidation of US Manufacturing Operations
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs			451			$ 2,800
Accelerated equipment depreciation expense						600
Cash payments with restructuring plan	200		427			1,400
Amount of liability	993		993		$ 1,337	993
2015 Consolidation of US Manufacturing Operations | Restructuring and exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs	100	2,300	300	2,300
2015 Consolidation of US Manufacturing Operations | Cost of goods sold
Restructuring Cost and Reserve [Line Items]
Accelerated equipment depreciation expense		$ 200	100	$ 200
2015 Consolidation of US Manufacturing Operations | Lease Obligation Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs	100		86		1,200	1,300
Cash payments with restructuring plan			0
Square feet of manufacturing facility | ft²		60,000		60,000
Amount of liability	967		967		1,043	967
2015 Consolidation of US Manufacturing Operations | Lease Obligation Costs | Accounts Payable and Accrued Liabilities
Restructuring Cost and Reserve [Line Items]
Amount of liability	200		200			200
2015 Consolidation of US Manufacturing Operations | Lease Obligation Costs | Other Long Term Liabilities
Restructuring Cost and Reserve [Line Items]
Amount of liability	800		800			800
2015 Consolidation of US Manufacturing Operations | Employee Severance Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs			67			1,200
Cash payments with restructuring plan		$ 100	194	$ 100
Amount of liability	13		13		294	13
2015 Consolidation of US Manufacturing Operations | Other Exit Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs			298			300
Cash payments with restructuring plan			233
Amount of liability	$ 13		$ 13		$ 0	$ 13