Annual report pursuant to Section 13 and 15(d)

Net Income Per Share - Anti-dilutive common stock equivalents (Details)

v3.20.4
Net Income Per Share - Anti-dilutive common stock equivalents (Details) - shares
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Anti-dilutive common stock equivalents      
Total anti-dilutive common stock equivalents 35,221 63,308 85,205
Restricted Stock Awards | Service-based conditions      
Anti-dilutive common stock equivalents      
Total anti-dilutive common stock equivalents 3,138 3,948 5,192
Restricted Stock Awards | Market-based conditions      
Anti-dilutive common stock equivalents      
Total anti-dilutive common stock equivalents 2,085 4,925 7,498
Stock Options      
Anti-dilutive common stock equivalents      
Total anti-dilutive common stock equivalents 29,998 54,435 72,515