LOANS HELD FOR SALE - Portfolio of Loans Held for Sale (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Accounts Notes And Loans Receivable [Line Items]
Loans Receivable Held For Sale Net	$ 48,670	$ 39,477
Residential Portfolio Segment [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans Receivable Held For Sale Net	48,670	39,477
Commercial Portfolio Segment [Member] | Mortgage Receivable [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans Receivable Held For Sale Net	0	0
Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans Receivable Held For Sale Net	0	0
Construction Loans [Member] | Commercial Portfolio Segment [Member]
Accounts Notes And Loans Receivable [Line Items]
Loans Receivable Held For Sale Net	$ 0	$ 0