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Loans and the Allowance for Credit Losses - Recorded Investment in Non-Accrual Loans (Detail) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans | $ 81,489 | $ 39,752
Commercial and Industrial [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans | 17,203 | 1,897
Home Equity [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans | 7,756 | 6,208
Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans | 27,183 | 19,036
Commercial Real Estate [Member] | Commercial Real Estate - Improved Property [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans | 27,183 | 19,036
Residential Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans | 26,002 | 12,524
Consumer [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Non-accrual loans | $ 3,345 | $ 87

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