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FHLB Advances, Other Borrowings and Junior Subordinated Notes Payable (Narrative Disclosures) (Details) - USD ($)
9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Debt Disclosure [Abstract]      
Line of credit commitment fee $ 10,000 $ 10,000  
Borrowed funds $ 493,575,000   $ 329,429,000
Borrowed funds, interest rate during period 1.95%   2.87%