Fair Value of Financial Instruments and Fair Value Measurements - Quantitative Information for Financial Instruments Measured at Fair Value (Details) $ in Thousands	Sep. 30, 2023 USD ($)	Dec. 31, 2022 USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Other real estate owned	$ 812	$ 651
Investment securities available for sale, at fair value	399,547	432,553
Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent impaired loans	628	521
Level 3 | Nonrecurring
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent impaired loans	628	521
Other real estate owned	812	651
Investment securities available for sale, at fair value	13,445	15,596
Other investments	$ 0	$ 790
Level 3 | Nonrecurring | Minimum | Measurement Input, Appraised Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent impaired loans, weighted average discount range	0	0.25
Other real estate owned, weighted average discount range	0	0
Level 3 | Nonrecurring | Maximum | Measurement Input, Appraised Value
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Collateral dependent impaired loans, weighted average discount range	0.50	0.50
Other real estate owned, weighted average discount range	0.20	0.20