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Loans and Allowance for Credit Losses on Loans - Additional Information (Details) | 6 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2024 USD ($) factor | Mar. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Jun. 30, 2023 USD ($) | Mar. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
Loans And Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Loans | $ 1,847,346,000 |  | $ 1,743,852,000 |  |  |
Number of past due days | 90 days |  |  |  |  |
Historical loss of reversion period, baseline scenario | 1 year |  |  |  |  |
Historical loss of reversion period, adverse scenario | 2 years |  |  |  |  |
Number of matrix factors | factor | 9 |  |  |  |  |
Non accrual loan | $ 500,000 |  |  |  |  |
Assess nonaccrual loans | 500,000 |  |  |  |  |
Collateral dependent loans | 1,870,106,000 |  | 1,765,845,000 |  |  |
Allowance for credit losses on loans | 22,760,000 | $ 22,129,000 | 21,993,000 | $ 20,802,000 | $ 20,814,000 | $ 19,241,000
Additional commitments lend to borrowers whose loans were modified | 2,700,000 |  |  |  |  |
Loan Borrowing |  |  |  |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Loans | 0 |  | 0 |  |  |
Collateralized Debt Obligations |  |  |  |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |  |  |  |
Collateral dependent loans | 2,900,000 |  | 5,200,000 |  |  |
Allowance for credit losses on loans | $ 360,000 |  | $ 355,000 |  |  |

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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 + Details
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- Definition Amortized cost excluding accrued interest, before allowance for credit loss, of 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 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 -Section 50 -Paragraph 5 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479319/326-20-50-5 + Details
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- Definition Amount of increase (decrease) in amortized cost excluding accrued interest, of financing receivable modified for debtor experiencing financial difficulty. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481962/310-10-50-42 + Details
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- Definition Reflects the amount of additional interest income that would have been recorded if impaired or nonperforming loans were instead current, in compliance with their original terms, and outstanding throughout the reporting period or since origination (if held for part of the period). + References No definition available. + Details
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