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Business Acquisitions and Divestiture - KWS BioTest Limited Purchase Price Allocation (Details) - USD ($)
$ in Thousands
Mar. 31, 2018
Jan. 11, 2018
Dec. 30, 2017
Business Acquisition [Line Items]      
Goodwill $ 835,936   $ 804,906
KWS BioTest Limited      
Business Acquisition [Line Items]      
Trade receivables, contractual amount   $ 1,309  
Trade receivables   1,309  
Other current assets (excluding cash)   99  
Property, plant and equipment   1,136  
Definite-lived intangible assets - client relationships   3,647  
Goodwill   18,165  
Current liabilities   (1,575)  
Deferred revenue   (151)  
Long-term liabilities   (596)  
Total purchase price allocation   $ 22,034