Debt instrument floating, floor interest rate.

No definition available.

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- Definition

Line of credit facility additional borrowings capacity.

+ References

No definition available.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in YYYY-MM-DD format.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

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- Definition

Carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

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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 value as of the balance sheet date, including the current and noncurrent portions, of collateralized debt obligations (with maturities initially due after one year or beyond the operating cycle, if longer). Such obligations include mortgage loans, chattel loans, and any other borrowings secured by assets of the borrower.

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- Definition

Fair value of the securities pledged as collateral against securities loaned.

+ References

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Fair value of securities pledged as collateral against securities sold under agreement to repurchase.

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Borrowings - Additional Information (Detail) - USD ($)					12 Months Ended
Borrowings - Additional Information (Detail) - USD ($)	Feb. 10, 2026	Feb. 10, 2025	Feb. 10, 2024	Feb. 10, 2023	Dec. 31, 2025	Dec. 31, 2024
Debt Instrument [Line Items]
Letter of credit						$ 118,326,000
Line of credit facility maximum borrowing capacity				$ 25,000,000
Debt Instrument, Maturity Date		Feb. 10, 2026	Feb. 10, 2025	Feb. 10, 2024
Debt instrument floating daily, floor Interest Rate					3.25%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage					0.20%
Bank stock loan					$ 0	0
Subsequent Event [Member]
Debt Instrument [Line Items]
Debt Instrument, Maturity Date	Feb. 10, 2027
Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity					25,000,000
Federal Home Loan Bank Advances [Member]
Debt Instrument [Line Items]
Letter of credit					64,635,000
Line of credit facility maximum borrowing capacity						964,545,000
Line of credit facility additional borrowing capacity					567,399,000	667,092,000
Federal Home Loan Bank Advances [Member] \| Securities [Member]
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity						79,417,000
Federal Home Loan Bank Advances [Member] \| Qualifying Loans [Member]
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity					932,939,000	885,128,000
Federal Reserve Bank Borrowings [Member]
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity					1,863,782,000	648,183,000
Pledged securities, fair value						9,070,000
Federal Reserve's Bank Term Funding Program [Member]
Debt Instrument [Line Items]
Secured borrowings from this facility					0	0
Government-Sponsored Residential Mortgage-Backed Securities [Member]
Debt Instrument [Line Items]
Residential mortgage-backed securities, fair value					41,481,000	45,249,000
Asset Pledged as Collateral without Right [Member] \| Federal Reserve Bank Borrowings [Member]
Debt Instrument [Line Items]
Pledged loan outstanding balance					$ 2,456,465,000	$ 852,957,000