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Stock-Based Compensation (Schedule of Outstanding Performance Stock Units) (Details) - Performance Shares [Member] - $ / shares
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Shares      
Units outstanding and unearned at January 1 174,600 111,000 48,600
PSUs granted during (at target) 64,600 63,600 62,400
PSUs earned during (at target) (70,363)    
Performance adjustment [1] 24,300    
Forfeitures (2,537)    
Units outstanding and unearned at December 31 190,600 174,600 111,000
Weighted Average Grant Date Fair Value      
Units outstanding and unearned at January 1 $ 15.15 $ 15.27 $ 16.25
PSUs granted during (at target) 18.64 14.26 15.21
PSUs earned during (at target) 16.25    
Performance adjustment [1] 16.25    
Forfeitures 16.25    
Units outstanding and unearned at December 31 $ 16.06 $ 15.15 $ 15.27
[1] Represents the change in PSUs issued based upon the attainment of performance goals established by the Company.