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Acquisitions (Details) - USD ($)
$ in Millions
2 Months Ended
Jul. 01, 2016
Feb. 07, 2017
Sep. 30, 2017
AFSC      
Acquisitions      
Base purchase price $ 117.5    
Amount of consideration paid in cash 113.5    
Maximum potential contingent payments 10.0   $ 10.0
Working capital receivable     2.7
AFSC | Restricted Common Stock      
Acquisitions      
Restricted common stock issued $ 4.0    
Restricted common stock issued, vesting period 2 years    
Veridicus      
Acquisitions      
Base purchase price   $ 74.5  
Increase (decrease) in Goodwill due to measurement period adjustment     2.1
Veridicus | Customer contracts      
Acquisitions      
Increase (decrease) in Goodwill due to measurement period adjustment     2.9
Veridicus | Other      
Acquisitions      
Increase (decrease) in Goodwill due to measurement period adjustment     $ (0.8)