Fair Value Measurements (Details 6) - Non-recurring $ in Thousands	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Level 3
Valuation Methodology
Assets measured at fair value	$ 4,126	$ 4,568
Carrying Value | Level 3 | Collateral based measurements | Impaired loans
Valuation Methodology
Assets measured at fair value	0	0
Carrying Value | Level 3 | Discounted cash flows | Mortgage servicing rights
Valuation Methodology
Assets measured at fair value	3,776	4,137
Carrying Value | Level 3 | Appraisals trade publications and auction values | Repossessions
Valuation Methodology
Assets measured at fair value	233	327
Carrying Value | Level 3 | Appraisals | Other real estate
Valuation Methodology
Assets measured at fair value	117	104
Fair Value
Valuation Methodology
Assets measured at fair value	4,126	4,568
Fair Value | Level 3 | Collateral based measurements | Impaired loans
Valuation Methodology
Assets measured at fair value	0	0
Fair Value | Level 3 | Discounted cash flows | Mortgage servicing rights
Valuation Methodology
Assets measured at fair value	8,029	8,007
Fair Value | Level 3 | Appraisals trade publications and auction values | Repossessions
Valuation Methodology
Assets measured at fair value	234	370
Fair Value | Level 3 | Appraisals | Other real estate
Valuation Methodology
Assets measured at fair value	$ 117	$ 104
Discount for lack of marketability and current conditions | Level 3 | Collateral based measurements | Impaired loans | Minimum
Unobservable Inputs
Impaired loans unobservable inputs (as a percent)	0	0
Discount for lack of marketability and current conditions | Level 3 | Collateral based measurements | Impaired loans | Maximum
Unobservable Inputs
Impaired loans unobservable inputs (as a percent)	0	0
Discount for lack of marketability and current conditions | Level 3 | Collateral based measurements | Impaired loans | Weighted Average
Unobservable Inputs
Impaired loans unobservable inputs (as a percent)	0.000	0.000
Constant prepayment rate (CPR) | Level 3 | Discounted cash flows | Mortgage servicing rights | Minimum
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.054	0.076
Constant prepayment rate (CPR) | Level 3 | Discounted cash flows | Mortgage servicing rights | Maximum
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.146	0.096
Constant prepayment rate (CPR) | Level 3 | Discounted cash flows | Mortgage servicing rights | Weighted Average
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.078	0.082
Discount rate | Level 3 | Discounted cash flows | Mortgage servicing rights | Minimum
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.118	0.114
Discount rate | Level 3 | Discounted cash flows | Mortgage servicing rights | Maximum
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.138	0.142
Discount rate | Level 3 | Discounted cash flows | Mortgage servicing rights | Weighted Average
Unobservable Inputs
Mortgage servicing rights unobservable inputs (as a percent)	0.119	0.115
Discount for lack of marketability | Level 3 | Appraisals trade publications and auction values | Repossessions | Minimum
Unobservable Inputs
Repossessions unobservable inputs (as a percent)	0	0.02
Discount for lack of marketability | Level 3 | Appraisals trade publications and auction values | Repossessions | Maximum
Unobservable Inputs
Repossessions unobservable inputs (as a percent)	0.04	0.09
Discount for lack of marketability | Level 3 | Appraisals trade publications and auction values | Repossessions | Weighted Average
Unobservable Inputs
Repossessions unobservable inputs (as a percent)	0	0.07
Discount for lack of marketability | Level 3 | Appraisals | Other real estate | Minimum
Unobservable Inputs
Other Real Estate Owned, Measurement Input	0	0
Discount for lack of marketability | Level 3 | Appraisals | Other real estate | Maximum
Unobservable Inputs
Other Real Estate Owned, Measurement Input	0	0
Discount for lack of marketability | Level 3 | Appraisals | Other real estate | Weighted Average
Unobservable Inputs
Other Real Estate Owned, Measurement Input	0	0