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Share-based Compensation - Additional Information (Details)
fungibleUnit in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2021
USD ($)
unit / shares
fungibleUnit
unit
shares
Mar. 31, 2020
USD ($)
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
shares
Jan. 01, 2008
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Capitalized to assets associated with compensation expense related to our long-term compensation plans, restricted stock and stock options $ 500,000 $ 600,000      
Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Period of commencement of option vesting, from date of grant (in years) 1 year        
Options granted (in shares) | shares 0   0    
Remaining weighted average contractual life of the options outstanding (in years) 1 year 10 months 24 days        
Remaining average contractual life of the options exercisable (in years) 1 year 10 months 24 days        
Stock options | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award expiration period (in years) 5 years        
Options vesting period (in years) 1 year        
Stock options | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Award expiration period (in years) 10 years        
Options vesting period (in years) 5 years        
Class O LTIP Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Preferred unit distributions as a percentage of common unit distributions 10.00%        
Restricted Stock Awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Compensation expense $ 2,067,125   $ 10,895,459    
Total unrecognized compensation cost related to unvested stock awards $ 14,000,000.0        
Weighted average period for recognition of compensation cost related to unvested stock awards (in years) 2 years        
Annual award vesting rate, low end of range (as a percent) 15.00%        
Annual award vesting rate, high end of range (as a percent) 35.00%        
Fair value of restricted stock vested during the period $ 10,900,000   12,500,000    
Weighted average fair value of options granted during the period $ 9,214,531   $ 734,315    
Awards granted (in shares) | shares 145,845   8,959    
Awards outstanding (in shares) | shares 3,573,082   3,439,674 3,465,347  
LTIP units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Weighted average fair value of options granted during the period $ 40,300,000   $ 37,000,000.0    
Performance Shares          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Compensation expense 9,100,000 3,000,000.0      
Total unrecognized compensation cost related to unvested stock awards $ 65,900,000        
Weighted average period for recognition of compensation cost related to unvested stock awards (in years) 2 years        
All other awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Expected term 10 years        
Third Amendment and Restated 2005 Stock Option and Incentive Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Maximum fungible units that may be granted (in shares) | unit 27,030,000        
Fungible units per share (in fungible units per share) | unit / shares 3.74        
Shares that may be issued if equal to fungible units (shares) (less than) | shares 27,030,000        
Fungible units | fungibleUnit 1.9        
Third Amendment and Restated 2005 Stock Option and Incentive Plan | Stock options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Compensation expense $ 0 20,000.00      
Total unrecognized compensation cost related to unvested stock awards $ 0        
Stock options, stock appreciation rights and other awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Fungible units per share (in fungible units per share) | unit / shares 0.73        
Award expiration period (in years) 5 years        
All other awards          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Fungible units per share (in fungible units per share) | unit / shares 1.0        
Deferred Stock Compensation Plan for Directors          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Compensation expense $ 1,800,000 $ 1,800,000      
Maximum percentage of the annual retainer fee, chairman fees and meeting fees that may be deferred by non-employee directors (percent) 100.00%        
Awards granted (in shares) | shares 18,290        
Shares issued (in shares) | shares 12,064        
Awards outstanding (in shares) | shares 159,066        
Employee Stock Purchase Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares of common stock available for issuance (shares) | shares         500,000
Duration of each offering period starting the first day of each calendar quarter (in months) 3 months        
Discount from market price 85.00%        
Shares of common stock issued (shares) | shares 157,576