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Loans and Leases and the Allowance for Credit Losses - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Loans And Leases Receivable [Line Items] |  |  |
Unamortized loan cost (fee) and purchase premium (discount) | $ (265,000) |  | $ 277,000
Financing receivable, accrued interest, before allowance for credit loss | 603,000 |  | 628,000
Amount of foreclosed residential real estate property held | 34,000 |  | 35,000
Loans secured by residential real estate that were in the process of foreclosure | $ 177,000 |  | 173,000
Percentage loans in the process of foreclosure, serviced by other entities, classified as government guaranteed | 41.00% |  |
Guaranteed by Government-Related Entities |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Modified past due 30-89 days | $ 29,000 | $ 30,000 |
Modified past due 90 days or more | $ 34,000 | $ 27,000 |
Commercial Real Estate |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Weighted-average remaining term | 9 months 18 days |  |
Commercial Real Estate | Asset Pledged as Collateral without Right |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Financing Receivable, before Allowance for Credit Loss | $ 14,400,000 |  |
Commercial Real Estate | Asset Pledged as Collateral without Right | FHLBs Facility |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Pledged financial instruments |  |  | 14,600,000
Residential Real Estate |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Weighted-average remaining term | 9 years | 11 years 4 months 24 days |
Residential Real Estate | Asset Pledged as Collateral without Right |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Financing Receivable, before Allowance for Credit Loss | $ 18,600,000 |  |
Residential Real Estate | Asset Pledged as Collateral without Right | FHLBs Facility |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Pledged financial instruments |  |  | 18,600,000
Commercial and industrial |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Weighted-average remaining term | 9 months 18 days | 8 months 12 days |
Commercial and industrial | Asset Pledged as Collateral without Right |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Financing Receivable, before Allowance for Credit Loss | $ 21,300,000 |  |
Commercial and industrial | Asset Pledged as Collateral without Right | FHLBs Facility |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Pledged financial instruments |  |  | 20,700,000
Commercial | Commercial Real Estate |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Mortgage loans held for sale | 192,000 |  | 310,000
Residential builder and developer | Commercial Real Estate |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Mortgage loans held for sale | 693,000 |  |
Residential | Residential Real Estate |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Mortgage loans held for sale | 179,000 |  | 211,000
Home equity lines and loans | Consumer: | Asset Pledged as Collateral without Right |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Financing Receivable, before Allowance for Credit Loss | 2,700,000 |  |
Home equity lines and loans | Consumer: | Asset Pledged as Collateral without Right | FHLBs Facility |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Pledged financial instruments |  |  | 2,700,000
Other | Consumer: | Asset Pledged as Collateral without Right |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Financing Receivable, before Allowance for Credit Loss | $ 12,700,000 |  |
Other | Consumer: | Asset Pledged as Collateral without Right | FHLBs Facility |  |  |
Loans And Leases Receivable [Line Items] |  |  |
Pledged financial instruments |  |  | $ 13,100,000

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