XML 107 R91.htm IDEA: XBRL DOCUMENT v3.22.0.1
Compensation Plans - Schedule of Various Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Expense $ 6,017 $ 4,178 $ 4,032
Total unrecognized compensation cost for nonvested stock units $ 8,200    
Expected years to recognize unearned compensation 2 years    
Weighted average fair value (usd per share) $ 47,160 $ 38,090.00 $ 47,460
Employee Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Expense $ 735 $ 468 $ 364
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Expense 3,109 2,613 1,969
Total fair value at vesting date 2,855 1,702 1,067
Total unrecognized compensation cost for nonvested stock units $ 4,622 $ 3,899 $ 3,417
Expected years to recognize unearned compensation 1 year 10 months 24 days 1 year 10 months 24 days 1 year 10 months 24 days
Stock Plan for Non-Management Directors      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares issued 12,998,000 15,901,000 11,382,000
Weighted average fair value (usd per share) $ 46.05 $ 30.28 $ 41.63