XML 68 R58.htm IDEA: XBRL DOCUMENT v3.22.2
Stock-Based Compensation Plans (Details)
$ / shares in Units, $ in Thousands
6 Months Ended
Jun. 30, 2022
USD ($)
Type
$ / shares
shares
Jun. 30, 2021
USD ($)
Restricted and Performance Stock Grants [Abstract]    
Number of types of restricted stock | Type 2  
Additional Disclosures [Abstract]    
Compensation expense, gross | $ $ 4,465 $ 4,381
Restricted Shares [Member] | Minimum [Member]    
Restricted and Performance Stock Grants [Abstract]    
Expiration of vesting period 3 years  
Restricted Shares [Member] | Employees [Member]    
Restricted and Performance Stock Grants [Abstract]    
Estimated forfeitures 5.00%  
Restricted Shares [Member] | Executives [Member]    
Restricted and Performance Stock Grants [Abstract]    
Estimated forfeitures 0.00%  
Restricted Shares [Member] | Directors [Member]    
Restricted and Performance Stock Grants [Abstract]    
Estimated forfeitures 0.00%  
Restricted Shares [Member] | Age 60 [Member] | Executives [Member]    
Restricted and Performance Stock Grants [Abstract]    
Vesting percentage 25.00%  
Vesting period before reaching age limit 2 months  
Restricted Shares [Member] | Age 63 [Member] | Executives [Member]    
Restricted and Performance Stock Grants [Abstract]    
Vesting percentage 25.00%  
Vesting period before reaching age limit 2 months  
Restricted Shares [Member] | Age 65 [Member] | Executives [Member]    
Restricted and Performance Stock Grants [Abstract]    
Vesting percentage 100.00%  
Vesting period before reaching age limit 2 months  
Performance-based Shares [Member]    
Restricted and Performance Stock Grants [Abstract]    
Measuring period for performance-based shares 3 years  
Performance-based Shares [Member] | Minimum [Member]    
Restricted and Performance Stock Grants [Abstract]    
Expiration of vesting period 3 years  
Restricted and Performance-Based Shares [Member]    
Restricted and performance-based stock, shares [Roll Forward]    
Beginning of period (in shares) 807,019  
Granted (in shares) 8,125  
Vested (in shares) (13,300)  
Forfeited (in shares) (5,500)  
End of period (in shares) 796,344  
Restricted and performance-based stock, weighted average grant date fair value per share [Roll Forward]    
Beginning of period (in dollars per share) | $ / shares $ 34.92  
Granted (in dollars per share) | $ / shares 33.81  
Vested (in dollars per share) | $ / shares 39.80  
Forfeited (in dollars per share) | $ / shares 42.24  
End of period (in dollars per share) | $ / shares $ 34.78  
Additional Disclosures [Abstract]    
Compensation expense, gross | $ $ 3,900 4,000
Compensation expense, net of tax | $ 2,900 $ 3,000
Unamortized compensation expense | $ $ 13,300  
Restricted and Performance-Based Shares [Member] | Employees [Member]    
Additional Disclosures [Abstract]    
Weighted average period of recognition for unrecognized compensation expense 4 years 2 months 12 days  
Restricted and Performance-Based Shares [Member] | Directors [Member]    
Additional Disclosures [Abstract]    
Weighted average period of recognition for unrecognized compensation expense 9 months 21 days  
Restricted and Performance-Based Shares [Member] | Executives and Directors [Member] | Minimum [Member]    
Restricted and Performance Stock Grants [Abstract]    
Post vesting holding period for restricted and performance shares issued 1 year  
Restricted and Performance-Based Shares [Member] | Executives and Directors [Member] | Maximum [Member]    
Restricted and Performance Stock Grants [Abstract]    
Post vesting holding period for restricted and performance shares issued 2 years  
2016 Omnibus Incentive Plan [Member] | Restricted and Performance-Based Shares [Member] | Maximum [Member]    
Restricted and Performance Stock Grants [Abstract]    
Shares authorized for issuance (in shares) 2,050,000