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Loans and Leases Receivable and Allowance for Credit Losses on Loans and Leases - Summary of Amortized Cost of Loans and Leases on Nonaccrual Status (Detail) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | $ 17,180 | $ 12,564
Nonaccrual loans with related allowance | 12,469 | 11,967
Total nonaccrual loans | 29,649 | 24,531
Commercial and industrial, including specialty lending |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 3,297 | 1,731
Nonaccrual loans with related allowance | 2,470 | 30
Total nonaccrual loans | 5,767 | 1,761
Multifamily |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 0 | 1,143
Nonaccrual loans with related allowance | 0 | 0
Total nonaccrual loans | 0 | 1,143
Commercial real estate owner occupied |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 7,442 | 2,768
Nonaccrual loans with related allowance | 0 | 0
Total nonaccrual loans | 7,442 | 2,768
Residential real estate |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 6,441 | 6,922
Nonaccrual loans with related allowance | 118 | 0
Total nonaccrual loans | 6,559 | 6,922
Manufactured housing |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 0 | 0
Nonaccrual loans with related allowance | 2,582 | 2,410
Total nonaccrual loans | 2,582 | 2,410
Installment |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 0 | 0
Nonaccrual loans with related allowance | 7,299 | 9,527
Total nonaccrual loans | $ 7,299 | $ 9,527

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- Definition Amortized cost excluding accrued interest, of financing receivable on nonaccrual status. 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 16 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-16 + Details
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