Fair Value Measurements - Carrying value and estimated fair value of financial instruments (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Securities:
Available-for-sale	$ 298,103	$ 239,300
Equity securities, at fair value	2,324	1,869
Carrying Value
Assets:
Cash and cash equivalents	182,361	105,799
Securities:
Available-for-sale	298,103	239,300
Held-to-maturity	104,177	105,509
Equity securities, at fair value	2,324	1,869
Loans, net	1,611,229	1,646,437
Bank owned life insurance	21,093	20,998
Accrued interest receivable	4,354	4,943
Liabilities:
Deposits	1,983,099	1,881,553
FHLB advances	18,000	18,000
Subordinated debt	24,845	24,728
Accrued interest payable	477	843
Fair Value
Assets:
Cash and cash equivalents	182,361	105,799
Securities:
Available-for-sale	298,103	239,300
Held-to-maturity	95,051	103,258
Equity securities, at fair value	2,324	1,869
Loans, net	1,591,517	1,659,396
Bank owned life insurance	21,093	20,998
Accrued interest receivable	4,354	4,943
Liabilities:
Deposits	1,981,407	1,882,132
FHLB advances	17,979	17,837
Subordinated debt	25,141	25,325
Accrued interest payable	477	843
Fair Value, Inputs, Level 1 | Fair Value
Assets:
Cash and cash equivalents	182,361	105,799
Securities:
Equity securities, at fair value	2,324	1,869
Fair Value, Inputs, Level 2 | Fair Value
Securities:
Available-for-sale	298,103	239,300
Held-to-maturity	95,051	103,258
Bank owned life insurance	21,093	20,998
Accrued interest receivable	4,354	4,943
Liabilities:
Deposits	1,981,407	1,882,132
FHLB advances	17,979	17,837
Accrued interest payable	477	843
Fair Value, Inputs, Level 3 | Fair Value
Securities:
Loans, net	1,591,517	1,659,396
Liabilities:
Subordinated debt	$ 25,141	$ 25,325