DEPOSITS - Components of Interest Expense on Deposits (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Deposits [Abstract]
Interest expense on deposits	$ 16,245	$ 20,159	$ 52,587	$ 56,385
Accretion Of Premium From Acquisitions	(284)	(2)	(285)	(6)
Amortization of broker placement fees	127	184	437	557
Interest expense on deposits	$ 16,088	$ 20,341	$ 52,739	$ 56,936