FHLB Advances, Other Borrowings and Subordinated Notes (Summary of Pledged Securities Related to Securities Sold Under Repurchase Agreements) (Details) - Overnight Sweep Collateral - Securities sold under repurchase agreements - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total collateral pledged	$ 26,058
Excess collateral	12,007
Securities sold under repurchase agreements	14,051	$ 11,400	$ 8,000
U.S. Government agencies
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total collateral pledged	10,773
Mortgage-backed securities
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total collateral pledged	14,941
Collateralized mortgage obligations
Financial Instruments Owned and Pledged as Collateral [Line Items]
Total collateral pledged	$ 344