XML 89 R79.htm IDEA: XBRL DOCUMENT v3.23.3
Share-Based Compensation - Stock Options (Details) - USD ($)
9 Months Ended
Sep. 30, 2023
Aggregate Intrinsic Value  
Exercisable at the end of the period $ 1,019,000
Additional disclosures  
Intrinsic value of stock option shares exercised $ 573,000
2004 plan  
Additional disclosures  
Granted (in shares) 0
2012 plan  
Additional disclosures  
Granted (in shares) 0
2019 plan  
Additional disclosures  
Granted (in shares) 0
2020 plan  
Share-Based Compensation  
Number of shares registered 2,072,245
Employee Stock Option [Member]  
Number of shares  
Outstanding at the beginning of the period (in shares) 161,832
Exercised (in shares) (22,651)
Expired (in shares) (5,491)
Outstanding at the end of the period (in shares) 133,690
Exercisable at the end of the period (in shares) 133,690
Weighted-Average Exercise Price  
Outstanding at the beginning of the period (in dollars per share) $ 66.20
Exercised (in dollars per share) 52.50
Expired (in dollars per share) 32.25
Outstanding at the end of the period (in dollars per share) 69.91
Exercisable at the end of the period (in dollars per share) $ 69.91
Weighted-Average Remaining Contractual Life  
Outstanding at the end of the period 2 years 8 months 1 day
Exercisable at the end of the period 2 years 8 months 1 day
Aggregate Intrinsic Value  
Outstanding at the end of the period $ 1,019,000
Additional disclosures  
Granted (in shares) 0
Total unrecognized compensation cost related to non vested stock option grants $ 0
Incentive stock options | Maximum  
Share-Based Compensation  
Vesting period 4 years
Incentive stock options | Plan 2004 and 2012  
Share-Based Compensation  
Vesting percentage 25.00%
Expiration period 10 years