XML 57 R46.htm IDEA: XBRL DOCUMENT v3.7.0.1
Share-Based Compensation - Incentive Unit Awards (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Share-Based Compensation      
Personnel accruals $ 26.2   $ 45.7
Incentive Unit Award      
Share-Based Compensation      
Vesting period 3 years    
Number of share right to receive cash payment on vesting equal to fair market value is received per award (in shares) 1    
Unrecognized compensation expense $ 6.5    
Weighted-average period for amortization of unrecognized compensation cost 1 year 6 months    
Compensation expense $ 1.2 $ 0.3  
Incentive Unit Award | Personnel Accruals      
Share-Based Compensation      
Personnel accruals $ 2.9   $ 1.9
Tranche One | Incentive Unit Award      
Share-Based Compensation      
Vesting rights percentage 33.33%    
Tranche Two | Incentive Unit Award      
Share-Based Compensation      
Vesting rights percentage 33.33%    
Tranche Three | Incentive Unit Award      
Share-Based Compensation      
Vesting rights percentage 33.33%