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Loans - Schedule of Loan Modifications (Parenthetical) (Detail)	6 Months Ended
	Jun. 30, 2025 Loan
Principal and Interest Deferment | Commercial Property Loans: Retail
Financing Receivable, Modified [Line Items]
Number of loan	2
Term extension of loan	3 months
Commercial and Industrial
Financing Receivable, Modified [Line Items]
Number of loan	1
Term extension of loan	6 years

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