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Stock-based Employee Compensation, Stock Option Plans, and Deferred Compensation Plan for Directors - Narrative (Details) - USD ($)
3 Months Ended
Jun. 30, 2023
Mar. 31, 2024
Mar. 31, 2023
Sep. 29, 2023
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]        
Deferred compensation (in shares) 117,382 1,991    
Shares due to exercise of employee stock options and issuance of directors' deferred stock   183 699  
Share-based payment arrangement, expense   $ 200,000    
Future expense   $ 1,700,000    
Exercised (in shares)   0 0  
Exercised   $ 0    
Closing share price (in usd per share)       $ 38.49
Share-based compensation arrangement by share-based payment award, options, grants since inception (in shares)       1,400,000
Weighted average remaining contractual life of the Company's outstanding options   5 years 3 months 18 days    
Weighted average remaining contractual life of the Company's exercisable options   3 years 10 months 24 days    
Granted (in shares)   0    
Common Stock        
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]        
Shares due to exercise of employee stock options and issuance of directors' deferred stock   7,970    
Employee Stock Option        
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]        
Expiration period   10 years    
Employee Stock Option | Officer        
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award Options [Line Items]        
Award vesting period   4 years