CREDIT QUALITY ASSESSMENT (Summary Information on Allowance for Loan and Lease Loss Activity) (Detail) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Credit Quality Assessment [Abstract]
Balance at beginning of year	$ 44,067	$ 40,895	$ 40,895
Provision (credit) for loan losses	194	1,236	5,546
Loan and lease charge-offs	(482)	(511)	(3,134)
Loan and lease recoveries	82	146	760
Net charge-offs	(400)	(365)	(2,374)
Balance at period end	$ 43,861	$ 41,766	$ 44,067