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Stock-based Employee Compensation, Stock Option Plans, and Deferred Compensation Plan for Directors - Narrative (Details)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
USD ($)
shares
May 20, 2024
shares
May 17, 2024
shares
Jun. 30, 2024
USD ($)
shares
Mar. 31, 2024
shares
Jun. 30, 2023
shares
Mar. 31, 2023
shares
Jun. 30, 2024
USD ($)
shares
Jun. 30, 2023
USD ($)
shares
Sep. 29, 2023
$ / shares
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Deferred compensation (in shares) 120,324             4,933    
Shares due to exercise of employee stock options and issuance of directors' deferred stock       4,375,000 183 3,104,000 699      
Exercised (in shares)               (4,375) (4,375)  
Closing share price (in usd per share) | $ / shares                   $ 36.77
Share-based compensation arrangement by share-based payment award, options, grants since inception (in shares)                   1,100,000
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               4 years 8 months 12 days    
Minimum required percentage of shares granted that will vest               0.90    
Minimum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Estimated percentage of shares granted that will vest               0.50    
Actual percentage of shares granted that will vest               0.90    
Maximum                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Estimated percentage of shares granted that will vest               1.50    
Actual percentage of shares granted that will vest               1.10    
Common Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Shares due to exercise of employee stock options and issuance of directors' deferred stock               7,970    
Employee Stock Option                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Expiration period               10 years    
Share-based payment arrangement, expense | $               $ 0.4    
Future expense | $ $ 1.3     $ 1.3       $ 1.3    
Employee Stock Option | Officers                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Award vesting period               4 years    
Restricted Stock                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based payment arrangement, expense | $               $ 0.5 $ 0.7  
Future expense | $ 4.3     4.3       $ 4.3    
Granted (in shares)               88,200    
Restricted Stock | Officers                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Award vesting period     5 years              
Granted (in shares)     117,000              
Restricted Stock | Directors                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Award vesting period   3 years                
Granted (in shares)   18,000                
Performance Shares                    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                    
Share-based payment arrangement, expense | $               $ 0.1    
Future expense | $ $ 3.0     $ 3.0       $ 3.0