Annual report pursuant to Section 13 and 15(d)

Earnings Per Share - Components of Basic and Diluted Earnings Per Share (Details)

v3.21.1
Earnings Per Share - Components of Basic and Diluted Earnings Per Share (Details) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Earnings Per Share Basic [Line Items]    
Net income available for Common Stock $ 370,577,000 $ 5,577,000
Weighted-average shares outstanding - basic 60,000  
Weighted-average shares outstanding - diluted 60,056  
Class A and Class B Common Stock    
Earnings Per Share Basic [Line Items]    
Net income available for Common Stock $ 370,577,000  
Weighted-average shares outstanding - basic 60,000,000  
Weighted-average shares outstanding - diluted 60,056,000  
Basic earnings per share:    
Basic earnings per share $ 6.18  
Diluted earnings per share:    
Diluted earnings per share $ 6.17  
Class A Common Stock    
Earnings Per Share Basic [Line Items]    
Weighted-average shares outstanding - basic 19,387  
Add dilutive effects of non-vested shares of restricted stock 56  
Class B Common Stock    
Earnings Per Share Basic [Line Items]    
Weighted-average shares outstanding - basic 40,613