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Restructuring (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Restructuring Cost and Reserve [Line Items]    
Restructuring expenses $ 1,231 $ 89
2015 California manufacturing operations restructuring plan    
Restructuring Cost and Reserve [Line Items]    
Restructuring expenses   $ 100
Employee severance | Severance liability and post employment benefits in connection with Globus transaction    
Restructuring Cost and Reserve [Line Items]    
Restructuring expenses $ 1,200