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Stock-Based Compensation and Other Employee Benefit Plans - Restricted Shares, Narrative (Details) - Restricted Shares - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Stock-Based Compensation and Other Employee Benefit Plans [Line Items]        
Stock-based compensation awards, unearned compensation $ 38.9   $ 38.9  
Stock-based compensation awards, unearned compensation, weighted average expected recognition period (in years)     1 year 10 months 24 days  
Stock-based compensation, vested awards, intrinsic value $ 0.3 $ 0.3 $ 19.5 $ 11.6