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Acquisitions - EnShape GmbH Purchase Price Allocation (Details) - USD ($)
$ in Thousands
Dec. 31, 2016
Oct. 27, 2016
Dec. 31, 2015
Dec. 31, 2014
Business Acquisition [Line Items]        
Goodwill $ 95,280   $ 81,448 $ 77,388
EnShape GmbH [Member]        
Business Acquisition [Line Items]        
Cash   $ 167    
Accounts receivable   4    
Inventories   79    
Prepaid expenses and other current assets   15    
Property, plant, and equipment   44    
Goodwill   8,613    
Accounts payable   (6)    
Accrued expenses   (209)    
Accrued income taxes   (2,342)    
Purchase price   7,901    
Customer Relationships [Member] | EnShape GmbH [Member]        
Business Acquisition [Line Items]        
Finite-lived intangible assets   447    
Technology-Based Intangible Assets [Member] | EnShape GmbH [Member]        
Business Acquisition [Line Items]        
Finite-lived intangible assets   $ 1,089