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Loans and Leases and the Allowance for Credit Losses - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Loans And Leases Receivable [Line Items] |  |  |  |  |
Modified in period | $ 441,000 | $ 348,000 | $ 916,000 | $ 641,000 |
Amount of foreclosed residential real estate property held | 33,000 |  | 33,000 |  | $ 39,000
Loans secured by residential real estate that were in the process of foreclosure | $ 165,000 |  | $ 165,000 |  | 170,000
Percentage loans in the process of foreclosure, serviced by other entities, classified as government guaranteed | 39.00% |  | 39.00% |  |
Guaranteed by Government-Related Entities |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Modified in period | $ 47,000 | 25,000 | $ 88,000 | 48,000 |
Modified past due 30-89 days | 45,000 | 11,000 | 45,000 | 11,000 |
Modified past due 90 days or more | $ 27,000 | $ 4,000 | $ 27,000 | $ 4,000 |
Commercial Real Estate |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Weighted-average remaining term | 7 months 6 days | 1 year | 9 months 18 days | 1 year 1 month 6 days |
Commercial Real Estate | Asset Pledged as Collateral without Right |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | $ 15,800,000 |  | $ 15,800,000 |  |
Commercial Real Estate | Asset Pledged as Collateral without Right | FHLBs Facility |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Pledged financial instruments |  |  |  |  | 16,400,000
Residential Real Estate |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Weighted-average remaining term | 8 years 10 months 24 days | 8 years 7 months 6 days | 10 years 2 months 12 days | 8 years 10 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 |  | $ 18,600,000 |  |
Residential Real Estate | Asset Pledged as Collateral without Right | FHLBs Facility |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Pledged financial instruments |  |  |  |  | 18,800,000
Commercial and industrial |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Modified in period | $ 64,000 | $ 27,000 | $ 209,000 | $ 95,000 |
Weighted-average remaining term | 8 months 12 days | 1 year 3 months 18 days | 9 months 18 days | 1 year 3 months 18 days |
Commercial and industrial | Asset Pledged as Collateral without Right |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | $ 19,100,000 |  | $ 19,100,000 |  |
Commercial and industrial | Asset Pledged as Collateral without Right | FHLBs Facility |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Pledged financial instruments |  |  |  |  | 13,400,000
Commercial | Commercial Real Estate |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Mortgage loans held for sale | 168,000 |  | 168,000 |  | 189,000
Modified in period | 168,000 | $ 60,000 | 377,000 | $ 150,000 |
Residential | Residential Real Estate |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Mortgage loans held for sale | 209,000 |  | 209,000 |  | 190,000
Modified in period | 56,000 | 39,000 | 101,000 | 72,000 |
Commercial Loans and Commercial Real Estate | Minimum |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Amount of real estate loan as reported as accruing or nonaccruing | 5,000 |  | 5,000 |  |
Unfunded Loan Commitment |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Modified in period | 1,000 | 78,000 | 27,000 | 82,000 |
Home equity lines and loans | Consumer: |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Modified in period | 0 | 1,000 | 1,000 | 1,000 |
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 | 2,600,000 |  | 2,600,000 |  |
Home equity lines and loans | Consumer: | Asset Pledged as Collateral without Right | FHLBs Facility |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Pledged financial instruments |  |  |  |  | 2,600,000
Other | Consumer: |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Modified in period | 0 | $ 0 | 0 | $ 0 |
Other | Consumer: | Asset Pledged as Collateral without Right |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Financing Receivable, before Allowance for Credit Loss | $ 10,300,000 |  | $ 10,300,000 |  |
Other | Consumer: | Asset Pledged as Collateral without Right | FHLBs Facility |  |  |  |  |
Loans And Leases Receivable [Line Items] |  |  |  |  |
Pledged financial instruments |  |  |  |  | $ 11,000,000

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