Delinquency status of loans and leases receivable modified past due ninety days or more.

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Delinquency status of loans and leases receivable modified past due thirty to eighty nine days.

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Financing receivable recorded investment accrual or nonaccrual status.

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Loans and leases receivable.

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Loans and leases weighted-average remaining term

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Percentage of loans in the process of foreclosure, serviced by other entities, classified as government guaranteed.

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Residential mortgage loans secured by residential real estate in process of foreclosure.

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Amortized cost excluding accrued interest, of financing receivable modified during period for debtor experiencing financial difficulty.

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Amount, after valuation allowance, of financing receivable held for sale and not part of disposal group. Excludes loan covered under loss sharing agreement and loan classified as investment in debt security.

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Amortized cost, before allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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Amortized cost, after allowance for credit loss, of financing receivable. Excludes financing receivable covered under loss sharing agreement and net investment in lease.

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Carrying amount as of the balance sheet date of other real estate and foreclosed assets. Other real estate may include real estate investments, real estate loans that qualify as investments in real estate, and premises that are no longer used in operations may also be included in real estate owned. Foreclosed assets include all assets obtained in full or partial satisfaction of a debt arrangement through foreclosure proceedings.

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Loans and Leases and the Allowance for Credit Losses - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Loans And Leases Receivable [Line Items]
Modified in period	$ 330,000	$ 592,000	$ 996,000	$ 1,198,000
Amount of foreclosed residential real estate property held	37,000		37,000		$ 39,000
Loans secured by residential real estate that were in the process of foreclosure	$ 166,000		$ 166,000		170,000
Percentage loans in the process of foreclosure, serviced by other entities, classified as government guaranteed	35.00%		35.00%
Guaranteed by Government-Related Entities
Loans And Leases Receivable [Line Items]
Modified in period	$ 33,000	45,000	$ 117,000	92,000
Modified past due 30-89 days	39,000	28,000	39,000	28,000
Modified past due 90 days or more	$ 34,000	$ 11,000	$ 34,000	$ 11,000
Commercial Real Estate
Loans And Leases Receivable [Line Items]
Weighted-average remaining term	7 months 6 days	1 year 3 months 18 days	9 months 18 days	1 year 2 months 12 days
Commercial Real Estate \| Asset Pledged as Collateral without Right
Loans And Leases Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 15,500,000		$ 15,500,000
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	9 years 1 month 6 days	11 years 6 months	9 years 10 months 24 days	10 years 1 month 6 days
Residential Real Estate \| Asset Pledged as Collateral without Right
Loans And Leases Receivable [Line Items]
Financing Receivable, before Allowance for Credit Loss	$ 18,500,000		$ 18,500,000
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	$ 117,000	$ 41,000	$ 270,000	$ 127,000
Weighted-average remaining term	1 year 3 months 18 days	1 year 3 months 18 days	1 year	1 year 2 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	$ 19,900,000		$ 19,900,000
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	716,000		716,000		189,000
Modified in period	164,000	$ 278,000	425,000	$ 423,000
Residential \| Residential Real Estate
Loans And Leases Receivable [Line Items]
Mortgage loans held for sale	242,000		242,000		190,000
Modified in period	42,000	55,000	139,000	125,000
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	8,000	62,000	43,000	138,000
Home equity lines and loans \| Consumer:
Loans And Leases Receivable [Line Items]
Modified in period	0	0	2,000	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	2,700,000		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					2,600,000
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	$ 12,700,000		$ 12,700,000
Other \| Consumer: \| Asset Pledged as Collateral without Right \| FHLBs Facility
Loans And Leases Receivable [Line Items]
Pledged financial instruments					$ 11,000,000