Fair Value Measurements - Fair value of assets measured at fair value on a recurring basis (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Securities available-for-sale:
Equity securities, at fair value	$ 2,443	$ 2,115
Total assets at fair value		360,908
Fair Value, Inputs, Level 1
Securities available-for-sale:
Total assets at fair value		2,115
Fair Value, Inputs, Level 2
Securities available-for-sale:
Total assets at fair value		358,793
Fair Value, Recurring
Securities available-for-sale:
Equity securities, at fair value	2,443	2,115
Mortgage servicing rights	9
Total assets at fair value	172,926
Total liabilities at fair value	1,390	1,217
Fair Value, Recurring | Interest Rate Swap [Member]
Securities available-for-sale:
Derivative assets	1,390
Total assets at fair value		1,217
Derivative liability	1,390	1,217
Fair Value, Recurring | U.S Treasuries
Securities available-for-sale:
Securities available-for-sale	42,194	59,210
Fair Value, Recurring | U.S. government and federal agencies
Securities available-for-sale:
Securities available-for-sale	12,881	34,760
Fair Value, Recurring | Corporate bonds
Securities available-for-sale:
Securities available-for-sale	2,406	2,614
Fair Value, Recurring | Collateralized mortgage obligations
Securities available-for-sale:
Securities available-for-sale	33,522	38,474
Fair Value, Recurring | Tax-exempt municipal
Securities available-for-sale:
Securities available-for-sale	1,156	4,645
Fair Value, Recurring | Taxable municipal
Securities available-for-sale:
Securities available-for-sale	580	579
Fair Value, Recurring | Mortgage-backed
Securities available-for-sale:
Securities available-for-sale	76,345	217,294
Fair Value, Recurring | Fair Value, Inputs, Level 1
Securities available-for-sale:
Equity securities, at fair value	2,443	2,115
Total assets at fair value	2,443
Fair Value, Recurring | Fair Value, Inputs, Level 2
Securities available-for-sale:
Total assets at fair value	170,474
Total liabilities at fair value	1,390	1,217
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Interest Rate Swap [Member]
Securities available-for-sale:
Derivative assets	1,390
Total assets at fair value		1,217
Derivative liability	1,390	1,217
Fair Value, Recurring | Fair Value, Inputs, Level 2 | U.S Treasuries
Securities available-for-sale:
Securities available-for-sale	42,194	59,210
Fair Value, Recurring | Fair Value, Inputs, Level 2 | U.S. government and federal agencies
Securities available-for-sale:
Securities available-for-sale	12,881	34,760
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Corporate bonds
Securities available-for-sale:
Securities available-for-sale	2,406	2,614
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Collateralized mortgage obligations
Securities available-for-sale:
Securities available-for-sale	33,522	38,474
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Tax-exempt municipal
Securities available-for-sale:
Securities available-for-sale	1,156	4,645
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Taxable municipal
Securities available-for-sale:
Securities available-for-sale	580	579
Fair Value, Recurring | Fair Value, Inputs, Level 2 | Mortgage-backed
Securities available-for-sale:
Securities available-for-sale	76,345	$ 217,294
Fair Value, Recurring | Fair Value, Inputs, Level 3
Securities available-for-sale:
Mortgage servicing rights	9
Total assets at fair value	$ 9