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Nature of Operations and Summary of Significant Accounting Policies (Equity Securities) (Details) - USD ($)
$ in Thousands
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]    
FHLB Stock $ 15,050 $ 15,050
FRB Stock 1,999 1,999
Other 334 334
Total 17,383 21,629
Investment in Corporate Settlement Solutions [Member]    
Schedule of Equity Method Investments [Line Items]    
Equity method investments $ 0 $ 4,246