Fair Value of Assets and Liabilities - Valuation Technique (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) item	Dec. 31, 2022 USD ($) item	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Valuation techniques and significant unobservable inputs
Servicing rights	$ 2,062	$ 2,314	$ 1,892	$ 2,137
Level 3 | Impaired loans | Appraisal value | Property specific adjustment
Valuation techniques and significant unobservable inputs
Individually evaluated	$ 3,998	$ 2,813
Impaired Loans, Measurement Input	0.100	0.100
Level 3 | Impaired loans | Appraisal value | Property specific adjustment | Weighted average
Valuation techniques and significant unobservable inputs
Impaired Loans, Measurement Input	0.100	0.100
Level 3 | Foreclosed assets | Appraisal value | Property specific adjustment
Valuation techniques and significant unobservable inputs
Foreclosed assets	$ 32	$ 30
Discount taken on Foreclosed assets balances	$ 0	$ 0
Level 3 | Servicing rights
Valuation techniques and significant unobservable inputs
Servicing Asset, Valuation Technique [Extensible List]	us-gaap:ValuationTechniqueDiscountedCashFlowMember	us-gaap:ValuationTechniqueDiscountedCashFlowMember
Level 3 | Servicing rights | Prepayment speed assumptions
Valuation techniques and significant unobservable inputs
Servicing rights	$ 2,052	$ 2,643
Level 3 | Servicing rights | Prepayment speed assumptions | Minimum
Valuation techniques and significant unobservable inputs
Servicing Asset, Measurement Input | item	85	103
Level 3 | Servicing rights | Prepayment speed assumptions | Maximum
Valuation techniques and significant unobservable inputs
Servicing Asset, Measurement Input | item	151	137
Level 3 | Servicing rights | Prepayment speed assumptions | Weighted average
Valuation techniques and significant unobservable inputs
Servicing Asset, Measurement Input	104	115
Level 3 | Servicing rights | Discount rate
Valuation techniques and significant unobservable inputs
Servicing Asset, Measurement Input	0.111	0.105
Level 3 | Servicing rights | Discount rate | Weighted average
Valuation techniques and significant unobservable inputs
Servicing Asset, Measurement Input	0.111	0.105