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Loans and Allowance for Credit Losses on Loans - Additional Information (Details) | 3 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Mar. 31, 2023 USD ($) factor | Jan. 01, 2023 USD ($) | Dec. 31, 2022 USD ($) | Mar. 31, 2022 USD ($) | Dec. 31, 2021 USD ($)
Loans And Leases Receivable Disclosure [Line Items] |  |  |  |  |
Loans, related parties | $ 0 |  | $ 0 |  |
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 | $ 250,000 |  |  |  |
Assess nonaccrual loans | 250,000 |  |  |  |
Collateral dependent loans | 1,692,485,000 |  | 1,678,292,000 |  |
Allowance for loan losses | 20,814,000 | $ 21,165,000 | 19,241,000 | $ 16,672,000 | $ 16,123,000
Collateralized Debt Obligations |  |  |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |  |  |
Collateral dependent loans | 1,900,000 |  |  |  |
Allowance for loan losses | 259,000 |  |  |  |
SBA—non-real estate |  |  |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |  |  |
Collateral dependent loans | 13,275,000 |  | 13,377,000 |  |
Allowance for loan losses | $ 67,000 | $ 65,000 | $ 207,000 | $ 169,000 | $ 199,000

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 + 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/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 5 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL82919230-210447 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 45 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=124255206&loc=SL82895884-210446 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 3B -URI https://asc.fasb.org/extlink&oid=124255953&loc=SL120267963-210447 + 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 Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=121585226&loc=d3e18794-111554 + Details
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