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Commitments and Contingencies (Details) - USD ($)
$ in Millions
 1 Months Ended 3 Months Ended 36 Months Ended
Dec. 31, 2008
Sep. 30, 2016
Jan. 31, 2015
Dec. 01, 2008
Operating lease, future minimum payments due, current   $ 2.0    
Operating lease, future minimum payments due, year two   6.0    
Operating lease, future minimum payments due, year three   6.0    
Operating leases, future minimum payments due, year four   6.0    
Operating leases, future minimum payments due, year five   6.0    
Operating lease, future minimum payments, due thereafter   75.0    
Compensation-related payments in connection with significant employment and incentive arrangements   30.0    
Prior Business Acquisition Required Compound Annual Growth Rate to Have Earned Maximum Contingent Payments 30.00%      
Alleged damages sought   $ 37.0    
Clover Capital Acquisition [Member]        
Business Acquisition Cost Of Acquired Entity Upfront Cash Paid $ 30.0      
Maximum contingent payments under acquisition agreement       $ 55.0
Contingent purchase price payments     $ 18.0