Annual report pursuant to Section 13 and 15(d)

Earnings Per Share - Additional Information (Details)

v3.21.1
Earnings Per Share - Additional Information (Details)
12 Months Ended
Dec. 31, 2020
shares
Earnings Per Share Basic [Line Items]  
Number of shares excluded from calculation of earnings per share 0
Restricted Stock Units  
Earnings Per Share Basic [Line Items]  
Right to receive common stock, upon vesting 1
Class A Common Stock  
Earnings Per Share Basic [Line Items]  
Common stock, voting rights one vote per share
Class B Common Stock  
Earnings Per Share Basic [Line Items]  
Common stock, voting rights ten votes per share