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Business Combinations Narrative (Details)
$ in Thousands
9 Months Ended
Sep. 30, 2017
USD ($)
Business Combinations [Abstract]  
Business Combination, Consideration Transferred, Other $ 99,500
Cash Acquired from Acquisition $ 18,200
Estimated time in months to complete in process research and development 3
Estimated cost to complete in process research and development projects $ 400
Goodwill acquired $ 59,137