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Restructuring (Narrative) (Details) - Suzhou Industrial Park Facility - USD ($)
$ in Millions
1 Months Ended 6 Months Ended
Apr. 30, 2018
Jun. 30, 2017
Restructuring Cost and Reserve [Line Items]    
Employee severance   $ (0.5)
Proceeds from sale of facility $ 13.3  
Building and Equipment    
Restructuring Cost and Reserve [Line Items]    
Asset Impairment Charges   $ (4.6)