Restructuring and Exit Costs (Narrative) (Details) ft² in Thousands, $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended	15 Months Ended	18 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Jun. 30, 2016 USD ($)	Sep. 30, 2016 USD ($)	Jun. 30, 2015 ft²
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs	$ 0	$ 56	$ 297	$ 2,396
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	26		453				$ 1,500
Amount of liability	892		892		$ 1,337		892
2015 Consolidation of US Manufacturing Operations | Restructuring and exit costs
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs	0	56	300	2,400
2015 Consolidation of US Manufacturing Operations | Cost of goods sold
Restructuring Cost and Reserve [Line Items]
Accelerated equipment depreciation expense		100	100	300
2015 Consolidation of US Manufacturing Operations | Lease Obligation Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and exit costs			86		1,200	1,300
Cash payments with restructuring plan			0
Square feet of manufacturing facility | ft²								60
Amount of liability	892		892		1,043		892
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	700		700				700
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		$ 700	207	$ 800
Amount of liability	0		0		294		0
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			246
Amount of liability	$ 0		$ 0		$ 0		$ 0