Loans and Allowance for Credit Losses on Loans - Schedule of Activity in Allowance for Credit Losses on Loans by Portfolio Segment (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended	12 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Analysis of allowance for loan losses
Beginning balance	$ 22,760	$ 20,802	$ 21,993	$ 19,241	$ 19,241
Impact of CECL adoption				1,924
Provision for (reversal of) credit losses	234	1,303	1,054	1,045
Charge-offs	(40)
Charge-offs		(492)	(108)	(628)	(864)
Recoveries	6	4	21	35
Ending balance	22,960	21,617	22,960	21,617	21,993
Commercial real estate
Analysis of allowance for loan losses
Beginning balance	7,926	6,784	7,915	6,951	6,951
Impact of CECL adoption				875
Provision for (reversal of) credit losses	1,481	1,171	1,492	220
Charge-offs	0
Charge-offs		(457)	0	(548)	(686)
Recoveries	0	0	0	0
Ending balance	9,407	7,498	9,407	7,498	7,915
SBA—real estate
Analysis of allowance for loan losses
Beginning balance	2,927	1,218	1,657	1,607	1,607
Impact of CECL adoption				(238)
Provision for (reversal of) credit losses	173	34	1,509	(106)
Charge-offs	0
Charge-offs		(35)	(66)	(46)	(46)
Recoveries	0	0	0	0
Ending balance	3,100	1,217	3,100	1,217	1,657
SBA—non-real estate
Analysis of allowance for loan losses
Beginning balance	253	55	147	207	207
Impact of CECL adoption				(142)
Provision for (reversal of) credit losses	58	91	149	84
Charge-offs	(42)
Charge-offs		0	(42)	(34)	(35)
Recoveries	6	4	21	35
Ending balance	275	150	275	150	147
C&I
Analysis of allowance for loan losses
Beginning balance	2,151	1,270	1,215	1,643	1,643
Impact of CECL adoption				(320)
Provision for (reversal of) credit losses	8	(115)	944	(168)
Charge-offs	0
Charge-offs		0	0	0	(97)
Recoveries	0	0	0	0
Ending balance	2,159	1,155	2,159	1,155	1,215
Home mortgage
Analysis of allowance for loan losses
Beginning balance	9,499	11,472	11,045	8,826	8,826
Impact of CECL adoption				1,753
Provision for (reversal of) credit losses	(1,482)	125	(3,026)	1,018
Charge-offs	2
Charge-offs		0	0	0	0
Recoveries	0	0	0	0
Ending balance	8,019	11,597	8,019	11,597	11,045
Consumer
Analysis of allowance for loan losses
Beginning balance	4	3	14	7	7
Impact of CECL adoption				(4)
Provision for (reversal of) credit losses	(4)	(3)	(14)	(3)
Charge-offs	0
Charge-offs		0	0	0	0
Recoveries	0	0	0	0
Ending balance	$ 0	$ 0	$ 0	$ 0	$ 14

Financing Receivable, Excluding Accrued Interest, Allowance for Credit Loss, Writeoff, Including Prior Year Reversal

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- Definition

Financing Receivable Excluding Accrued Interest Credit Loss Impact of CECL Adoption

+ References

No definition available.

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- Definition

Amount excluding accrued interest, of allowance for credit loss on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 1
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479344/326-20-45-1

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount, excluding accrued interest, of increase in allowance for credit loss on financing receivable from recovery. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (e)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

Amount, excluding accrued interest, of decrease in allowance for credit loss on financing receivable from writeoff. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 6
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-6

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (d)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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- Definition

Amount, excluding accrued interest, of credit loss expense (reversal of expense) on financing receivable. Excludes net investment in lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 13
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147479319/326-20-50-13

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