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Stock-based Compensation (Changes in Non-vested Restricted Stock Units) (Details) - Restricted Stock Units [Member] - $ / shares
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Shares      
Undistributed as of beginning of period (in shares) 70,900    
Granted (in shares) 24,100    
Distributed (in shares) (40,600)    
Forfeited (in shares) (8,900)    
Undistributed as of end of period (in shares) 45,500 70,900  
Weighted- Average Grant Date Fair Value per Share      
Undistributed as of beginning of period (in usd per share) $ 306.01    
Granted (in usd per share) 551.56 $ 404.91 $ 0
Distributed (in usd per share) 243.07    
Forfeited (in usd per share) 388.26    
Undistributed as of end of period (in usd per share) $ 474.46 $ 306.01