DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Effect of Derivative Instruments on Statement of Income (Loss) (Detail) - Not Designated as Hedging Instrument, Economic Hedge [Member] - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Economic undesignated hedges:
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 726	$ 228	$ 1,386	$ 358
Sale of TBA GNMA MBS pools [Member] | Mortgage Banking [Member]
Economic undesignated hedges:
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	454	214	458	210
Forward loan sales commitments [Member] | Mortgage Banking [Member]
Economic undesignated hedges:
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	0	0	0	8
Interest Rate Lock Commitments [Member] | Mortgage Banking [Member]
Economic undesignated hedges:
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	254	15	910	145
Interest Rate Cap [Member] | Interest Income [Member]
Economic undesignated hedges:
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	0	(1)	0	(5)
Interest Rate Cap [Member] | Interest Rate Swap [Member] | Interest Income [Member]
Economic undesignated hedges:
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	$ 18	$ 0	$ 18	$ 0