Quarterly report pursuant to Section 13 or 15(d)

Loans - Loans (Detail) (Parenthetical)

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Loans - Loans (Detail) (Parenthetical) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total gross loans receivable $ 5,980,458 $ 5,967,133
Real Estate    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total gross loans receivable 4,602,093 4,567,853
Real Estate | Home Equity Loans and Lines - Residential    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total gross loans receivable 2,400 2,400
Real Estate | Personal Loans - Residential    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Total gross loans receivable $ 6,700 $ 4,600