CREDIT QUALITY ASSESSMENT (Summary Information on Allowance for Loan and Lease Loss Activity) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Credit Quality Assessment [Abstract]
Balance at beginning of year			$ 40,895	$ 37,802	$ 37,802
Provision (credit) for loan and lease losses	$ 781	$ 1,706	4,974	3,521	5,371
Loan and lease charge-offs			(2,586)	(2,753)	(3,795)
Loan and lease recoveries			659	1,091	1,517
Net charge-offs			(1,927)	(1,662)	(2,278)
Balance at period end	$ 43,942	$ 39,661	$ 43,942	$ 39,661	$ 40,895