OTHER REAL ESTATE OWNED- Other real estate owned (Detail) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Other Real Estate And Foreclosed Assets [Line Items]
Other real estate owned	$ 99,674	$ 101,626
Other Real Estate Owned [Member]
Other Real Estate And Foreclosed Assets [Line Items]
Other real estate owned	99,674	101,626
Other Real Estate Owned [Member] | Residential
Other Real Estate And Foreclosed Assets [Line Items]
Other real estate owned	46,427	46,912
Other Real Estate Owned [Member] | Commercial loans[Member] | Commercial And Industrial Sector [Member]
Other Real Estate And Foreclosed Assets [Line Items]
Other real estate owned	45,878	47,271
Other Real Estate Owned [Member] | Commercial loans[Member] | Construction
Other Real Estate And Foreclosed Assets [Line Items]
Other real estate owned	$ 7,369	$ 7,443