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Accounting Policies (Narrative) (Details)
12 Months Ended
Dec. 31, 2020
$ / shares
Par value of stock bought from and sold to the federal home loan bank (in dollars per share) $ 100
Building and Leasehold Improvements [Member] | Minimum [Member]  
Useful lives seven
Building and Leasehold Improvements [Member] | Maximum [Member]  
Useful lives 40
Furniture And Equipment [Member] | Minimum [Member]  
Useful lives one
Furniture And Equipment [Member] | Maximum [Member]  
Useful lives 15
Computer Equipment [Member] | Minimum [Member]  
Useful lives two
Computer Equipment [Member] | Maximum [Member]  
Useful lives five