OTHER REAL ESTATE OWNED- Other real estate owned (Detail) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Real Estate Properties [Line Items]
Other real estate owned	$ 89,049	$ 101,626
Other Real Estate Owned [Member]
Real Estate Properties [Line Items]
Other real estate owned	89,049	101,626
Other Real Estate Owned [Member] | Residential Portfolio Segment [Member]
Real Estate Properties [Line Items]
Other real estate owned	37,075	46,912
Other Real Estate Owned [Member] | Commercial Portfolio Segment [Member] | Commercial And Industrial Sector [Member]
Real Estate Properties [Line Items]
Other real estate owned	45,396	47,271
Other Real Estate Owned [Member] | Commercial Portfolio Segment [Member] | Construction Loans [Member]
Real Estate Properties [Line Items]
Other real estate owned	$ 6,578	$ 7,443