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Loans - Allowance for loan losses by segment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2023
Allowance for Loan Losses:
Beginning Balance	$ 47,996	$ 40,020	$ 34,841
Provision for Credit Losses on Loans	2,050	7,700	5,150
Loans Charged-off	(224)	(37)	(74)
Recoveries of Loans	22	313	103
Total Ending Allowance Balance	50,494	47,996	40,020
Allowance for loan losses and the recorded investment
Allowance for Loan Losses and Loans, Individually Evaluated for Impairment	103	71
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment	50,391	47,925
Loans and Leases Receivable, Allowance, Total	50,494	47,996	40,020	$ 48,646
Loans, Individually Evaluated for Impairment	35,858	28,049
Loans, Collectively Evaluated for Impairment	3,688,424	3,541,397
Totals	3,724,282	3,569,446
Cumulative Effect of Change
Allowance for Loan Losses:
Beginning Balance	650
Total Ending Allowance Balance		650
Allowance for loan losses and the recorded investment
Loans and Leases Receivable, Allowance, Total		650
Commercial
Allowance for Loan Losses:
Beginning Balance	6,501	6,269	5,773
Provision for Credit Losses on Loans	225	235	488
Loans Charged-off	(180)	(13)	(28)
Recoveries of Loans	10	10	36
Total Ending Allowance Balance	5,398	6,501	6,269
Allowance for loan losses and the recorded investment
Allowance for Loan Losses and Loans, Individually Evaluated for Impairment	8	71
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment	5,390	6,430
Loans and Leases Receivable, Allowance, Total	5,398	6,501	6,269	5,343
Loans, Individually Evaluated for Impairment	16,143	19,675
Loans, Collectively Evaluated for Impairment	447,918	416,718
Totals	464,061	436,393
Commercial | Cumulative Effect of Change
Allowance for Loan Losses:
Beginning Balance	(1,158)
Total Ending Allowance Balance		(1,158)
Allowance for loan losses and the recorded investment
Loans and Leases Receivable, Allowance, Total		(1,158)
Construction and Land Development
Allowance for Loan Losses:
Beginning Balance	3,911	3,139	1,679
Provision for Credit Losses on Loans	(685)	772	1,460
Total Ending Allowance Balance	2,156	3,911	3,139
Allowance for loan losses and the recorded investment
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment	2,156	3,911
Loans and Leases Receivable, Allowance, Total	2,156	3,911	3,139	2,841
Loans, Individually Evaluated for Impairment	80	106
Loans, Collectively Evaluated for Impairment	232,724	295,448
Totals	232,804	295,554
Construction and Land Development | Cumulative Effect of Change
Allowance for Loan Losses:
Beginning Balance	(1,070)
Total Ending Allowance Balance		(1,070)
Allowance for loan losses and the recorded investment
Loans and Leases Receivable, Allowance, Total		(1,070)
1-4 Family Construction
Allowance for Loan Losses:
Beginning Balance	845	618	812
Provision for Credit Losses on Loans	(52)	227	(194)
Total Ending Allowance Balance	558	845	618
Allowance for loan losses and the recorded investment
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment	558	845
Loans and Leases Receivable, Allowance, Total	558	845	618	610
Loans, Individually Evaluated for Impairment	249
Loans, Collectively Evaluated for Impairment	64,838	70,242
Totals	65,087	70,242
1-4 Family Construction | Cumulative Effect of Change
Allowance for Loan Losses:
Beginning Balance	(235)
Total Ending Allowance Balance		(235)
Allowance for loan losses and the recorded investment
Loans and Leases Receivable, Allowance, Total		(235)
1-4 Family Mortgage
Allowance for Loan Losses:
Beginning Balance	4,325	3,757	3,972
Provision for Credit Losses on Loans	99	280	(236)
Loans Charged-off			(5)
Recoveries of Loans	5	288	26
Total Ending Allowance Balance	2,651	4,325	3,757
Allowance for loan losses and the recorded investment
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment	2,651	4,325
Loans and Leases Receivable, Allowance, Total	2,651	4,325	3,757	2,547
Loans, Individually Evaluated for Impairment	689	392
Loans, Collectively Evaluated for Impairment	401,707	355,082
Totals	402,396	355,474
1-4 Family Mortgage | Cumulative Effect of Change
Allowance for Loan Losses:
Beginning Balance	(1,778)
Total Ending Allowance Balance		(1,778)
Allowance for loan losses and the recorded investment
Loans and Leases Receivable, Allowance, Total		(1,778)
Multifamily
Allowance for Loan Losses:
Beginning Balance	17,459	12,610	9,517
Provision for Credit Losses on Loans	1,440	4,849	3,093
Total Ending Allowance Balance	22,217	17,459	12,610
Allowance for loan losses and the recorded investment
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment	22,217	17,459
Loans and Leases Receivable, Allowance, Total	22,217	17,459	12,610	20,777
Loans, Collectively Evaluated for Impairment	1,388,541	1,306,738
Totals	1,388,541	1,306,738
Multifamily | Cumulative Effect of Change
Allowance for Loan Losses:
Beginning Balance	3,318
Total Ending Allowance Balance		3,318
Allowance for loan losses and the recorded investment
Loans and Leases Receivable, Allowance, Total		3,318
CRE Owner Occupied
Allowance for Loan Losses:
Beginning Balance	1,965	1,495	1,162
Provision for Credit Losses on Loans	162	470	301
Recoveries of Loans			32
Total Ending Allowance Balance	1,184	1,965	1,495
Allowance for loan losses and the recorded investment
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment	1,184	1,965
Loans and Leases Receivable, Allowance, Total	1,184	1,965	1,495	1,022
Loans, Individually Evaluated for Impairment	1,559	1,637
Loans, Collectively Evaluated for Impairment	174,224	148,268
Totals	175,783	149,905
CRE Owner Occupied | Cumulative Effect of Change
Allowance for Loan Losses:
Beginning Balance	(943)
Total Ending Allowance Balance		(943)
Allowance for loan losses and the recorded investment
Loans and Leases Receivable, Allowance, Total		(943)
CRE Non-owner Occupied
Allowance for Loan Losses:
Beginning Balance	12,576	11,335	10,991
Provision for Credit Losses on Loans	780	1,241	344
Total Ending Allowance Balance	16,225	12,576	11,335
Allowance for loan losses and the recorded investment
Allowance for Loan Losses and Loans, Individually Evaluated for Impairment	95
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment	16,130	12,576
Loans and Leases Receivable, Allowance, Total	16,225	12,576	11,335	15,445
Loans, Individually Evaluated for Impairment	17,138	6,239
Loans, Collectively Evaluated for Impairment	970,168	940,769
Totals	987,306	947,008
CRE Non-owner Occupied | Cumulative Effect of Change
Allowance for Loan Losses:
Beginning Balance	2,869
Total Ending Allowance Balance		2,869
Allowance for loan losses and the recorded investment
Loans and Leases Receivable, Allowance, Total		2,869
Consumer and other
Allowance for Loan Losses:
Beginning Balance	151	147	203
Provision for Credit Losses on Loans	81	13	(24)
Loans Charged-off	(44)	(24)	(41)
Recoveries of Loans	7	15	9
Total Ending Allowance Balance	105	151	147
Allowance for loan losses and the recorded investment
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment	105	151
Loans and Leases Receivable, Allowance, Total	105	151	147	$ 61
Loans, Collectively Evaluated for Impairment	8,304	8,132
Totals	8,304	8,132
Consumer and other | Cumulative Effect of Change
Allowance for Loan Losses:
Beginning Balance	(90)
Total Ending Allowance Balance		(90)
Allowance for loan losses and the recorded investment
Loans and Leases Receivable, Allowance, Total		(90)
Unallocated
Allowance for Loan Losses:
Beginning Balance	263	650	732
Provision for Credit Losses on Loans		(387)	(82)
Total Ending Allowance Balance		263	650
Allowance for loan losses and the recorded investment
Allowance for Loan Losses and Loans, Collectively Evaluated for Impairment		263
Loans and Leases Receivable, Allowance, Total		263	$ 650
Unallocated | Cumulative Effect of Change
Allowance for Loan Losses:
Beginning Balance	$ (263)
Total Ending Allowance Balance		(263)
Allowance for loan losses and the recorded investment
Loans and Leases Receivable, Allowance, Total		$ (263)

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