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Fair Value Measurements - Schedule of Fair Value Measurements (Details) - USD ($)
$ in Thousands
Sep. 30, 2024
Dec. 31, 2023
Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value $ 418,079 $ 451,693  
Equity securities with readily determinable fair values 947 928 $ 1,719
Loans held for sale 1,080 280  
Foreclosed assets held for resale 406 467  
Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Equity securities with readily determinable fair values 947 928  
Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 418,079 451,693  
Equity securities with readily determinable fair values 0 0  
Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Equity securities with readily determinable fair values 0 0  
U.S. Government and agencies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 152,209 156,795  
Residential mortgage-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 149,068 158,830  
Corporate bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 15,838 29,694  
Commercial mortgage-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 62,897 65,290  
Recurring | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Equity securities with readily determinable fair values 947 928  
Loans held for sale 0 0  
Recurring | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 418,079 451,693  
Equity securities with readily determinable fair values 0 0  
Loans held for sale 1,080 280  
Recurring | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Equity securities with readily determinable fair values 0 0  
Loans held for sale 0 0  
Recurring | U.S. Government and agencies | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Recurring | U.S. Government and agencies | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 152,209 156,795  
Recurring | U.S. Government and agencies | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Recurring | Residential mortgage-backed securities | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Recurring | Residential mortgage-backed securities | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 149,068 158,830  
Recurring | Residential mortgage-backed securities | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Recurring | Corporate bonds | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Recurring | Corporate bonds | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 15,838 29,694  
Recurring | Corporate bonds | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Recurring | Commercial mortgage-backed securities | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Recurring | Commercial mortgage-backed securities | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 62,897 65,290  
Recurring | Commercial mortgage-backed securities | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Recurring | Collateralized Mortgage Obligations | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Recurring | Collateralized Mortgage Obligations | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 38,067 41,084  
Recurring | Collateralized Mortgage Obligations | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 0 0  
Non-recurring | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Foreclosed assets held for resale 0 0  
Non-recurring | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Foreclosed assets held for resale 0 0  
Non-recurring | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Foreclosed assets held for resale 406 467  
Non-recurring | Individually evaluated loans | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impaired loans 0 0  
Non-recurring | Individually evaluated loans | Level 2      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impaired loans 0 0  
Non-recurring | Individually evaluated loans | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impaired loans 262 242  
Total      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 418,079 451,693  
Equity securities with readily determinable fair values 947 928  
Total | Recurring      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 418,079 451,693  
Equity securities with readily determinable fair values 947 928  
Loans held for sale 1,080 280  
Total | Recurring | U.S. Government and agencies      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 152,209 156,795  
Total | Recurring | Residential mortgage-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 149,068 158,830  
Total | Recurring | Corporate bonds      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 15,838 29,694  
Total | Recurring | Commercial mortgage-backed securities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 62,897 65,290  
Total | Recurring | Collateralized Mortgage Obligations      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Investment securities available for sale, at estimated fair value 38,067 41,084  
Total | Non-recurring      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Foreclosed assets held for resale 406 467  
Total | Non-recurring | Individually evaluated loans      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Impaired loans $ 262 $ 242