DEPOSITS - Components of Interest Expense on Deposits (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Deposits [Abstract]
Interest expense on deposits	$ 17,305	$ 16,607
Accretion Of Premium From Acquisitions	(2)	(3)
Amortization of broker placement fees	189	367
Interest expense on deposits	$ 17,492	$ 16,971