LOANS HELD FOR INVESTMENT - Additional Information II (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Interest Income Recognized on Nonaccrual Loans	$ 0.6	$ 0.5
Residential Portfolio Segment [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans in process of foreclosure amount	$ 37.7
Loans foreclosure delinquency threshold	120 days
Residential Portfolio Segment [Member] | Loans Insured or Guaranteed by US Government Authorities [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans in process of foreclosure amount	$ 14.8
Residential Portfolio Segment [Member] | Financial Asset Acquired with Credit Deterioration [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Mortgage loans in process of foreclosure amount	5.3
Nonperforming Financial Instruments [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Financing receivable accrued interest writeoff	$ 0.8	$ 0.6