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Share-Based Compensation Restricted Cash Awards (Details) - Restricted Cash Awards [Member] - shares
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 3,167,675 0
Shares granted 3,249,925  
Shares vested (7,000)  
Shares forfeited (75,250)  
Unvested balance at end of period 3,167,675