Portfolio Loans Receivable and Allowance for Credit Losses - Classification of Loans (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross amount	$ 1,970,657	$ 1,910,930
Loans receivable, gross percent	100.00%	100.00%
Deferred origination fees, net	$ (6,132)	$ (7,642)
Allowance for credit losses	(29,350)	(28,610)	$ (26,216)	$ (27,189)
Total portfolio loans held for investment, net	1,935,175	1,874,678
Residential \| Real estate:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross amount	$ 577,112	$ 573,104
Loans receivable, gross percent	29.00%	30.00%
Allowance for credit losses	$ (5,926)	$ (5,518)	(5,408)	(4,283)
Commercial \| Real estate:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross amount	$ 736,316	$ 684,229
Loans receivable, gross percent	37.00%	35.00%
Allowance for credit losses	$ (11,123)	$ (10,316)	(8,931)	(12,039)
Construction \| Real estate:
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross amount	$ 290,016	$ 290,108
Loans receivable, gross percent	15.00%	15.00%
Allowance for credit losses	$ (2,299)	$ (2,271)	(1,753)	(1,809)
Commercial and Industrial
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross amount	$ 254,577	$ 239,208
Loans receivable, gross percent	13.00%	13.00%
Allowance for credit losses	$ (4,002)	$ (4,406)	(4,958)	(4,008)
Consumer \| Credit card, net of reserve
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross amount	$ 111,898	$ 123,331
Loans receivable, gross percent	6.00%	7.00%
Allowance for credit losses	$ (5,990)	$ (6,087)	(5,151)	(5,033)
Consumer \| Other consumer
Accounts, Notes, Loans and Financing Receivable [Line Items]
Loans receivable, gross amount	$ 738	$ 950
Loans receivable, gross percent	0.00%	0.00%
Allowance for credit losses	$ (10)	$ (12)	$ (15)	$ (17)

Percentage of allowance for credit loss to total financing receivable outstanding.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name Regulation S-K (SK)
-Number 229
-Section 1405
-Paragraph (a)
-Subparagraph (1)
-Publisher SEC

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
-Section 45
-Paragraph 2
-Publisher FASB
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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

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3B
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-3B

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
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-Paragraph 5
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-Publisher FASB
-URI https://asc.fasb.org//1943274/2147479319/326-20-50-5

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