DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Effect of Derivative Instruments on Statement of Income (Loss) (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments Gain Loss [Line Items]
Interest Income Loans	$ (147,126)	$ (147,625)
Mortgage banking activities	3,788	3,627
Not Designated as Hedging Instrument, Economic Hedge [Member]
Economic undesignated hedges:
Total gain (loss) on derivatives	(756)	108
Not Designated as Hedging Instrument, Economic Hedge [Member] | Sale of TBA GNMA MBS pools [Member] | Mortgage Banking [Member]
Economic undesignated hedges:
Total gain (loss) on derivatives	(665)	127
Not Designated as Hedging Instrument, Economic Hedge [Member] | Forward loan sales commitments [Member] | Mortgage Banking [Member]
Economic undesignated hedges:
Total gain (loss) on derivatives	0	5
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest Rate Lock Commitments [Member] | Mortgage Banking [Member]
Economic undesignated hedges:
Total gain (loss) on derivatives	(91)	(20)
Not Designated as Hedging Instrument, Economic Hedge [Member] | Interest Rate Cap [Member] | Interest Income [Member]
Economic undesignated hedges:
Total gain (loss) on derivatives	$ 0	$ (4)