Loans and Allowance for Credit Losses - Summary of Activity in Allowance for Loan Losses (Parenthetical) (Detail) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Financing Receivable, Allowance for Credit Losses [Line Items]
Cumulative charges of loans and loan collateral process of foreclosure	$ 9,007	$ 9,932
Taxi Medallion [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Cumulative charges of loans and loan collateral process of foreclosure	161,500
New York Taxi Medallion [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Cumulative charges of loans and loan collateral process of foreclosure	$ 95,200