Nature of Operations and Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) operatingSegment component reporting_unit quarter bankDivision	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Property, Plant and Equipment
Number of bank divisions | bankDivision	17
Number of operating segments | operatingSegment	1
Maximum period of original maturity to be included in cash and cash equivalents	3 months
Federal reserve balance or cash on hand required	$ 0
Minimum period past due to consider loans as delinquent	30 days
Minimum period past due to consider loans as non accrual	90 days
Financing receivable, allowance for credit losses, forecasting period | quarter	4
Financing receivable, allowance for credit losses, number of components | component	2
Maximum term leases will be considered short-term	12 months
Maximum period up to which purchase price of business is allocated to assets acquired and liabilities assumed	1 year
Number of reporting units subsequent to aggregation for goodwill assessment | reporting_unit	1
Revenue from contracts with customers	$ 82,850,000	$ 65,194,000	$ 54,520,000
Impairment losses on receivables related to contracts with customers	$ 0	$ 0
Percentage of likelihood for term more likely than not as it relates to income taxes	50.00%
Minimum
Property, Plant and Equipment
Period past due to consider loan as purchased credit-deteriorated loan	90 days
Minimum number of days delinquent to charge off loans	120 days
Number of years for home equity loan origination term	10 years
Period past due to consider loans as delinquent	30 days
Period past due to consider loans as non accrual	90 days
Minimum | Office Buildings
Property, Plant and Equipment
Useful life of premises and equipment	15 years
Minimum | Furniture, Fixtures and Equipment
Property, Plant and Equipment
Useful life of premises and equipment	3 years
Maximum
Property, Plant and Equipment
Number of years for home equity loan origination term	15 years
Period past due to consider loans as delinquent	89 days
Maximum | Office Buildings
Property, Plant and Equipment
Useful life of premises and equipment	40 years
Maximum | Furniture, Fixtures and Equipment
Property, Plant and Equipment
Useful life of premises and equipment	10 years