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Contingent Consideration - Maximum Amounts of Cash Obligations with Business Acquisitions and Strategic Investment (Details)
$ in Millions
Mar. 31, 2017
USD ($)
Options To Acquire Additional Investments  
Business Acquisition, Contingent Consideration [Line Items]  
Total maximum cash obligations $ 49.3
Liability recognized on financial statements 29.6
Performance-based | Contingent cash consideration  
Business Acquisition, Contingent Consideration [Line Items]  
Amount of the maximum contingent cash obligations associated with business acquisitions that are unlikely to be paid $ 10.3