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Shareholders' Equity (Changes in Shares of Common Stock) (Details) - shares
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Shareholders Equity [Line Items]      
Treasury stock, beginning balance 759,555    
Shares issued, beginning balance 16,099,556 16,099,556 16,099,556
Treasury stock purchases 0    
Treasury stock, ending balance 692,150 759,555  
Shares issued, ending balance 16,099,556 16,099,556 16,099,556
Common Stock [Member]      
Shareholders Equity [Line Items]      
Shares outstanding, beginning balance 15,340,001 15,745,453 16,041,926
Shares issued for Landmark Group acquisition     12,831
Restricted stock awards issued 20,185 12,242 9,350
Restricted stock units released 59,984 55,912 24,069
Stock awards 10,591 7,856 5,972
Treasury stock purchases (23,355) (481,462) (348,695)
Shares outstanding, ending balance 15,407,406 15,340,001 15,745,453
Treasury Stock [Member]      
Shareholders Equity [Line Items]      
Treasury stock, beginning balance 759,555 354,103 57,630
Shares issued for Landmark Group acquisition     (12,831)
Restricted stock awards issued (20,185) (12,242) (9,350)
Restricted stock units released (59,984) (55,912) (24,069)
Stock awards (10,591) (7,856) (5,972)
Treasury stock purchases 23,355 481,462 348,695
Treasury stock, ending balance 692,150 759,555 354,103