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Share-Based Payments, Deferred Compensation and Employee Ownership Plans - Performance Awards Narrative (Details) - USD ($)
1 Months Ended 9 Months Ended
Feb. 28, 2021
Jul. 30, 2020
Apr. 30, 2019
Mar. 31, 2016
Sep. 30, 2021
Sep. 30, 2020
Performance based restricted stock | Minimum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percent of RSU's earned         0.00%  
Performance based restricted stock | Maximum            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Percent of RSU's earned         220.00%  
Equity Plans | Performance based restricted stock            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, shares 1,603,630 1,603,630 1,603,630 1,603,630    
Vested, shares         379,319  
Forfeited, shares         320,681  
Equity Plans | Performance based restricted stock | Share Distribution            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vested, shares         350,000  
Equity Plans | Performance based restricted stock | Cash and Cash Equivalents            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vested, shares         70,000  
Equity Plans | Performance based restricted stock | Share-based Payment Arrangement, Tranche Three [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Vested, shares         233,333  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Vested         $ 420,000  
Equity Plans | Restricted Shares and Restricted Stock Units (RSUs)            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Granted, shares         1,714,646 2,638,544
Vested, shares         1,425,327 1,320,318
Forfeited, shares         162,218 111,212
Unrecognized compensation expense         $ 85,600,000  
Period for recognition         1 year 9 months 21 days