XML 83 R70.htm IDEA: XBRL DOCUMENT v3.20.4
Share-Based Compensation - Plans (Details)
12 Months Ended
Dec. 31, 2020
plan
shares
Dec. 31, 2019
shares
Dec. 31, 2018
shares
Share-Based Compensation      
Number of stock incentive plans | plan 2    
Stock incentive plan, vesting period 4 years    
Options granted (in shares) 233,888 145,221 234,959
Stock Incentive Plan 2007      
Share-Based Compensation      
Number of common shares authorized under the plan (in shares) 9,679,393    
Options granted to date (in shares) 904,196    
Non-option awards to date (in shares) 7,278,646    
Exercised to date (in shares) 319,731    
Time-RSUs | Minimum      
Share-Based Compensation      
Stock incentive plan, vesting period 3 years    
Time-RSUs | Maximum      
Share-Based Compensation      
Stock incentive plan, vesting period 4 years    
Performance and Market-Based RSUs | Minimum      
Share-Based Compensation      
Stock incentive plan, vesting period 3 years    
Performance and Market-Based RSUs | Maximum      
Share-Based Compensation      
Stock incentive plan, vesting period 4 years