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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] | 3 Months Ended | 12 Months Ended
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Mar. 31, 2024 | Dec. 31, 2023
Residential Mortgage Loans [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Allowance for credit losses to amortized cost | 2.02% | 2.03%
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Allowance for credit losses to amortized cost | 1.07% | 1.05%
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Allowance for credit losses to amortized cost | 1.38% | 1.41%
Commercial Portfolio Segment [Member] | Construction Loans [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Allowance for credit losses to amortized cost | 2.61% | 2.61%
Consumer Portfolio Segment [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Allowance for credit losses to amortized cost | 3.63% | 3.64%
Loan Total [Member] |  |
Financing Receivable Allowance For Credit Losses [Line Items] |  |
Allowance for credit losses to amortized cost | 2.14% | 2.15%

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