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Share-Based Compensation Arrangements (Restricted Stock Units Activity) (Details) - Restricted Stock Units [Member] - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Number of Shares:      
Beginning of period 66,115    
Granted 19,185 27,385 26,070
Vested (15,543)    
Forfeited (3,472)    
End of period 66,285 66,115  
Weighted Average Grant Date Fair Value (in dollars per share):      
Beginning of period $ 44.80    
Granted 53.00    
Vested 52.24    
Forfeited 45.28    
End of period $ 45.41 $ 44.80