CREDIT QUALITY ASSESSMENT (Summary Information on Allowance for Loan and Lease Loss Activity) (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Credit Quality Assessment [Abstract]
Balance at beginning of year			$ 53,486	$ 45,257	$ 45,257
Provision (credit) for loan losses	$ 1,633	$ 1,733	1,505	3,730	9,023
Loan charge-offs			(1,197)	(818)	(1,416)
Loan recoveries			230	324	622
Net charge-offs			(967)	(494)	(794)
Balance at period end	$ 54,024	$ 48,493	$ 54,024	$ 48,493	$ 53,486