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Stock-Based Compensation and Other Employee Benefit Plans (Tables)
 6 Months Ended
Jun. 30, 2021
Share-based Payment Arrangement [Abstract]  
Schedule of Activity, Restricted Shares
Activity, restricted shares: (a)
Restricted
Shares		Per Share Weighted Average Grant Date Fair Value
Non-vested restricted shares, as of December 31, 20201,845,341 $34.90 
Granted155,795 93.39 
Vested(115,028)52.10 
Canceled/forfeited(14,400)30.58 
Non-vested restricted shares, as of June 30, 20211,871,708 $38.75 
(a)    Includes 2,500 and 2,300 restricted stock units as of June 30, 2021 and December 31, 2020, respectively.