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Loans - Narrative (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024 USD ($) modified_loan loan	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) modified_loan loan	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($) loan	Jun. 30, 2024 USD ($)
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loans, net of unearned income	$ 1,886,037		$ 1,886,037		$ 1,883,470
Accrued interest receivable for loans	8,800		8,800		8,800
Outstanding balance of high risk loans, minimum	500		500
Financing receivable, excluding accrued interest, collateral-dependent	2,200		2,200		$ 1,400
Interest income	$ 173	$ 55	$ 390	$ 265
Loan contracts restructured | modified_loan	6		10
Number of loans that subsequently defaulted | loan	0		0		0
Commercial real estate
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loans, net of unearned income	$ 1,208,856		$ 1,208,856		$ 1,221,521
Financing receivable, grading risk matrix, minimum threshold	$ 500		$ 500
Financing receivable, grading risk matrix, maximum threshold						$ 500
Loan contracts restructured | modified_loan			3
Commercial real estate | Payment Delay
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loan contracts restructured | modified_loan			1
Commercial real estate | Term Extension
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loan contracts restructured | modified_loan	1
Term extension from modification (in years)	20 years
Commercial real estate | Term Extension | One Year Term Extension
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loan contracts restructured | modified_loan			2
Term extension from modification (in years)			1 year
Commercial real estate | Term Extension | Twenty Year Term Extension
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loan contracts restructured | modified_loan			1
Term extension from modification (in years)			20 years
Commercial, financial & agricultural
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loans, net of unearned income	$ 242,389		$ 242,389		242,756
Loan contracts restructured | modified_loan	5		7
Commercial, financial & agricultural | Payment Delay
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loan contracts restructured | modified_loan	3		4
Commercial, financial & agricultural | Term Extension and Payment Delay
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loan contracts restructured | modified_loan	2		3
Term extension from modification (in years)	10 years
Commercial, financial & agricultural | Term Extension and Payment Delay | Five Year Term Extension
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loan contracts restructured | modified_loan			1
Term extension from modification (in years)			5 years
Commercial, financial & agricultural | Term Extension and Payment Delay | Ten Year Term Extension
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loan contracts restructured | modified_loan			2
Term extension from modification (in years)			10 years
Loans Insured or Guaranteed by US Government Authorities
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loans, net of unearned income	$ 98,409		$ 98,409		86,765
Loans Insured or Guaranteed by US Government Authorities | Commercial real estate
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loans, net of unearned income	56,672		56,672		47,879
Loans Insured or Guaranteed by US Government Authorities | Commercial, financial & agricultural
Other than Temporary Impairment, Credit Losses Recognized in Earnings [Line Items]
Loans, net of unearned income	$ 31,612		$ 31,612		$ 26,716

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