XML 91 R77.htm IDEA: XBRL DOCUMENT v3.20.4
Stock Based Compensation Narrative (Details) - plan
12 Months Ended
Dec. 31, 2020
Sep. 25, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of compensation plans 3      
Stock dividend, percent 300.00% [1] 300.00% 300.00% 300.00%
Expiration period (in years) 10 years      
Award vesting period (in years) 4 years      
Discount from market price 5.00%      
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period (in years) 3 years      
Employee Stock        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Discount from market price 5.00%      
[1] Included in the shares issued for the 3% stock dividend in 2020 were treasury shares of 137,041