Allowance for Credit Losses - Credit Quality Indicators (Details)	Dec. 31, 2022 USD ($)
Allowance for loan losses
Loans, excluding consumer finance	$ 1,161,161,000
Pass
Allowance for loan losses
Loans, excluding consumer finance	1,152,847,000
Special Mention
Allowance for loan losses
Loans, excluding consumer finance	1,487,000
Substandard
Allowance for loan losses
Loans, excluding consumer finance	6,563,000
Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	264,000
Doubtful
Allowance for loan losses
Loans, excluding consumer finance	0
Residential mortgage
Allowance for loan losses
Loans, excluding consumer finance	266,267,000
Residential mortgage | Pass
Allowance for loan losses
Loans, excluding consumer finance	264,891,000
Residential mortgage | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	518,000
Residential mortgage | Substandard
Allowance for loan losses
Loans, excluding consumer finance	702,000
Residential mortgage | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	156,000
Construction - commercial real estate
Allowance for loan losses
Loans, excluding consumer finance	49,136,000
Construction - commercial real estate | Pass
Allowance for loan losses
Loans, excluding consumer finance	49,136,000
Construction - consumer real estate
Allowance for loan losses
Loans, excluding consumer finance	10,539,000
Construction - consumer real estate | Pass
Allowance for loan losses
Loans, excluding consumer finance	10,539,000
Commercial real estate
Allowance for loan losses
Loans, excluding consumer finance	592,301,000
Commercial real estate | Pass
Allowance for loan losses
Loans, excluding consumer finance	585,707,000
Commercial real estate | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	738,000
Commercial real estate | Substandard
Allowance for loan losses
Loans, excluding consumer finance	5,856,000
Land acquisition and development
Allowance for loan losses
Loans, excluding consumer finance	37,537,000
Land acquisition and development | Pass
Allowance for loan losses
Loans, excluding consumer finance	37,537,000
Builder lines
Allowance for loan losses
Loans, excluding consumer finance	34,538,000
Builder lines | Pass
Allowance for loan losses
Loans, excluding consumer finance	34,538,000
Commercial business
Allowance for loan losses
Loans, excluding consumer finance	118,605,000
Commercial business | Pass
Allowance for loan losses
Loans, excluding consumer finance	118,605,000
Equity lines
Allowance for loan losses
Loans, excluding consumer finance	43,300,000
Equity lines | Pass
Allowance for loan losses
Loans, excluding consumer finance	43,147,000
Equity lines | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	40,000
Equity lines | Substandard
Allowance for loan losses
Loans, excluding consumer finance	5,000
Equity lines | Substandard Nonaccrual
Allowance for loan losses
Loans, excluding consumer finance	108,000
Other consumer
Allowance for loan losses
Loans, excluding consumer finance	8,938,000
Other consumer | Pass
Allowance for loan losses
Loans, excluding consumer finance	8,747,000
Other consumer | Special Mention
Allowance for loan losses
Loans, excluding consumer finance	$ 191,000