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, 2016	Mar. 31, 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	1,236	597	5,371
Loan and lease charge-offs	(511)	(1,114)	(3,795)
Loan and lease recoveries	146	190	1,517
Net charge-offs	(365)	(924)	(2,278)
Balance at period end	$ 41,766	$ 37,475	$ 40,895