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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, 2025 | Dec. 31, 2024
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Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | $ 15,505 | $ 32,593
Nonaccrual loans with related allowance | 6,028 | 7,905
Total nonaccrual loans | 21,533 | 40,498
Commercial and industrial, including specialized lending |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 4,430 | 4,041
Nonaccrual loans with related allowance | 0 | 0
Total nonaccrual loans | 4,430 | 4,041
Multifamily |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 0 | 11,834
Nonaccrual loans with related allowance | 0 | 0
Total nonaccrual loans | 0 | 11,834
Commercial real estate owner occupied |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 3,932 | 8,090
Nonaccrual loans with related allowance | 0 | 0
Total nonaccrual loans | 3,932 | 8,090
Commercial real estate non-owner occupied |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 0 | 354
Nonaccrual loans with related allowance | 0 | 0
Total nonaccrual loans | 0 | 354
Residential real estate |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 7,143 | 8,274
Nonaccrual loans with related allowance | 488 | 440
Total nonaccrual loans | 7,631 | 8,714
Manufactured housing |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 0 | 0
Nonaccrual loans with related allowance | 1,315 | 1,852
Total nonaccrual loans | 1,315 | 1,852
Installment |  |
Financing Receivable, Impaired [Line Items] |  |
Nonaccrual loans with no related allowance | 0 | 0
Nonaccrual loans with related allowance | 4,225 | 5,613
Total nonaccrual loans | $ 4,225 | $ 5,613

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