XML 113 R97.htm IDEA: XBRL DOCUMENT v3.20.4
Compensation Plans - Schedule of Various Information (Details) - USD ($)
$ / shares in Units, $ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense $ 4,178 $ 4,032 $ 3,452
Total unrecognized compensation cost for nonvested stock units $ 5,000    
Expected years to recognize unearned compensation 2 years    
Weighted average fair value (usd per share) $ 38,090.00 $ 47,460  
Employee Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense $ 468 $ 364 174
Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense 2,613 1,969 1,211
Total fair value at vesting date 1,702 1,067 1,544
Total unrecognized compensation cost for nonvested stock units $ 3,899 $ 3,417 $ 2,175
Expected years to recognize unearned compensation 1 year 10 months 24 days 1 year 10 months 24 days 2 years
Stock Options and SSARs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Intrinsic value of option/SSAR exercises on date of exercise $ 597 $ 407 $ 2,469
Stock Plan for Non-Management Directors      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares issued 15,901,000 11,382,000 11,750,000
Weighted average fair value (usd per share) $ 30.28 $ 41.63 $ 50.74