Annual report pursuant to Section 13 and 15(d)

Compensation and Other Benefit Plans - Stock Options (Details)

v3.20.4
Compensation and Other Benefit Plans - Stock Options (Details) - Stock Options
12 Months Ended
Dec. 31, 2020
Share-based compensation  
Minimum age required for employees to qualify for immediate vesting of award 55 years
Threshold years required for retirement age 70 years
Employees  
Share-based compensation  
Vesting period 3 years
Directors  
Share-based compensation  
Vesting period 1 year