Commitments and Contingent Liabilities - Summary of Unfunded Fixed Rate Loan Commitments (Details) $ in Thousands	9 Months Ended
	Sep. 30, 2021 USD ($)
Schedule Of Disclosure Of Unfunded Fixed Rate Loan Commitments [Line Items]
Due in One Year Or Less	$ 15,956
Over One Year But Less Than Five Years	3,346
Over Five Years	7,641
Total	26,943
Interest rate less than or equal to 4.00%
Schedule Of Disclosure Of Unfunded Fixed Rate Loan Commitments [Line Items]
Due in One Year Or Less	13,461
Over One Year But Less Than Five Years	1,841
Over Five Years	6,646
Total	21,948
Interest rate between 4.00% and 5.00%
Schedule Of Disclosure Of Unfunded Fixed Rate Loan Commitments [Line Items]
Due in One Year Or Less	2,245
Over One Year But Less Than Five Years	1,160
Over Five Years	995
Total	4,400
Interest rate greater than or equal to 5.00%
Schedule Of Disclosure Of Unfunded Fixed Rate Loan Commitments [Line Items]
Due in One Year Or Less	250
Over One Year But Less Than Five Years	345
Over Five Years	0
Total	$ 595