v3.26.3
Loans - Additional Information (Detail) - USD ($)
$ in Thousands
Sep. 30, 2026
Dec. 31, 2025
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Loans held for sale $ 2,527 $ 3,934
Residential mortgage loan 2,709,358 2,685,990
Asset Pledged as Collateral without Right [Member] | HELOC [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Residential mortgage loan 17,900 15,800
Asset Pledged as Collateral without Right [Member] | Commercial Real Estate [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Residential mortgage loan 212,500 231,800
Asset Pledged as Collateral without Right [Member] | Multi-family Real Estate Loans [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Residential mortgage loan 19,900 29,100
Asset Pledged as Collateral without Right [Member] | Residential Mortgage [Member]    
Accounts, Notes, Loans and Financing Receivable [Line Items]    
Residential mortgage loan $ 167,800 $ 175,800