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Share-Based Compensation Arrangements (Restricted Stock Units Activity) (Details) - Restricted Stock Units [Member] - $ / shares
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Number of Shares:      
Beginning of period 66,285    
Granted 21,467 19,185 27,385
Vested (22,416)    
Forfeited (24)    
End of period 65,312 66,285  
Weighted Average Grant Date Fair Value (in dollars per share):      
Beginning of period $ 45.41    
Granted 50.03    
Vested 49.52    
Forfeited 52.18    
End of period $ 45.51 $ 45.41