Restructuring (Narrative) (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2017 USD ($) employee	Dec. 31, 2016 USD ($)
Restructuring Cost and Reserve [Line Items]
Assets held for sale	$ 14,117	$ 4,477
Suzhou Industrial Park Facility
Restructuring Cost and Reserve [Line Items]
Employee severance	(500)
Suzhou Industrial Park Facility | Building and Equipment
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	(4,600)
Suzhou Industrial Park Facility | Land
Restructuring Cost and Reserve [Line Items]
Assets held for sale	$ 14,100
2015 and 2016 Reorganization Plans
Restructuring Cost and Reserve [Line Items]
Expected number of positions eliminated | employee	326
Number of positions eliminated | employee	292