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Earnings Per Common Share And Share Awards (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Earnings Per Common Share And Share Awards [Line Items]          
Anti-dilutive shares excluded from computation of diluted earnings per share 5 13 5 13  
Number of SARs granted where exercise price was less than market price on date of grant     0 0  
SARs          
Earnings Per Common Share And Share Awards [Line Items]          
Share-based compensation arrangement by share-based payment award, grants in period, net of forfeitures 5 5 5   5
Share-based compensation arrangement by share-based payment award, grants in period, weighted average grant date fair value     $ 105.31 $ 64.00  
Share-based payment arrangement, expense     $ 225 $ 168  
Share-based payment arrangement, nonvested award, cost not yet recognized, amount $ 550   $ 550    
Maximum | SARs          
Earnings Per Common Share And Share Awards [Line Items]          
Share-based compensation arrangement by share-based payment award, shares purchased for award     250    
SARs expiration period     7 years    
SARs vesting period     5 years