Interest Rate Swaps - Amounts and Locations of Activity Related to Back-to-Back Interest Rate Swaps (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
3rd Party interest rate swaps
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Notional Amount, Asset	$ 34,089	$ 35,382
Average Maturity (in years)	6 years 8 months 12 days	7 years 8 months 12 days
Weighted Average Fixed Rate	4.13%	4.13%
Assets (Liabilities), at fair value	$ 4,017	$ 1,877
Customer interest rate swaps
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Notional Amount, Liability	$ (34,089)	$ (35,382)
Average Maturity (in years)	6 years 8 months 12 days	7 years 8 months 12 days
Weighted Average Fixed Rate	4.13%	4.13%
Assets (Liabilities), at fair value	$ (4,017)	$ (1,877)
LIBOR | 3rd Party interest rate swaps
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative basis spread on variable rate	2.27%	2.27%
LIBOR | Customer interest rate swaps
Schedule Of Loans And Allowance For Loan By Class Individually And Collectively Evaluated For Impairment [Line Items]
Derivative basis spread on variable rate	2.27%	2.27%