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Employee Compensation and Benefit Plans - Schedule of Stock Awards Vesting (Details)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
2011 - 2014 Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options awarded (percentage)     100.00%
2011 - 2014 Awards | Time-Based | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options awarded (percentage)     43.00%
Award vesting period (years) 4 years    
Vesting percentage of awards (percentage) 25.00%    
2011 - 2014 Awards | Market Performance-Based | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options awarded (percentage)     50.00%
Award vesting period (years) 3 years    
Vesting percentage of awards (percentage) 25.00%    
Percentage of compounded annual gain of stock price over the exercise price (percentage) 20.00%    
2011 - 2014 Awards | Extraordinary Market Performance-Based | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options awarded (percentage)     7.00%
Award vesting period (years) 3 years    
Vesting percentage of awards (percentage) 25.00%    
Percentage of compounded annual gain of stock price over the exercise price (percentage) 25.00%    
2011 - 2014 Awards | Market Performance Based - Stock Price Has at Least Doubled Over the Exercise Price | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage of awards (percentage) 25.00%    
2011 - 2014 Awards | Market Performance Based - Stock Price Has at Least Tripled Over the Exercise Price | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting percentage of awards (percentage) 25.00%    
2015 - 2016 Awards | Time-Based | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options awarded (percentage)   100.00%  
Award vesting period (years) 4 years    
Vesting percentage of awards (percentage) 25.00%    
2017 - 2020 Awards      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options awarded (percentage) 100.00%    
2017 - 2020 Awards | Time-Based | Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options awarded (percentage) 9.00%    
Award vesting period (years) 3 years    
Vesting percentage of awards (percentage) 33.00%    
2017 - 2020 Awards | Time-Based | Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options awarded (percentage) 47.00%    
Award vesting period (years) 3 years    
Vesting percentage of awards (percentage) 33.30%    
2017 - 2020 Awards | Time-Based Vesting Schedule and Market Performance-Based Vesting Date | Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options awarded (percentage) 18.00%    
Award vesting period (years) 4 years    
Vesting percentage of awards (percentage) 25.00%    
2017 - 2020 Awards | Time-Based Vesting Schedule And Market Performance-Based Vesting Date One [Member] | Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percent of options awarded (percentage) 26.00%    
Award vesting period (years) 3 years    
Vesting percentage of awards (percentage) 100.00%