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ALLOWANCE FOR CREDIT LOSSES FOR LOANS AND FINANCE LEASES - Carrying Amount of Portfolios (Detail) - Allowance for loan and lease losses, numerator [Member] - Amortized cost, denominator [Member] | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Residential Mortgage Loans [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Allowance for credit losses to amortized cost | 2.03% | 2.20%
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Allowance for credit losses to amortized cost | 0.99% | 1.14%
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Allowance for credit losses to amortized cost | 1.78% | 1.49%
Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Allowance for credit losses to amortized cost | 2.77% | 1.74%
Consumer Portfolio Segment [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Allowance for credit losses to amortized cost | 3.61% | 3.83%
Loan Total [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Allowance for credit losses to amortized cost | 2.21% | 2.25%

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