CREDIT QUALITY ASSESSMENT (Summary Information on Allowance for Loan and Lease Loss Activity) (Detail) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Credit Quality Assessment [Abstract]
Balance at beginning of year				$ 40,895				$ 37,802	$ 40,895	$ 37,802	$ 38,766
Provision (credit) for loan losses	$ 572	$ 781	$ 2,957	$ 1,236	$ 1,850	$ 1,706	$ 1,218	$ 597	5,546	5,371	(163)
Loan and lease charge-offs									(3,134)	(3,795)	(2,687)
Loan and lease recoveries									760	1,517	1,886
Net charge-offs									(2,374)	(2,278)	(801)
Balance at period end	$ 44,067				$ 40,895				$ 44,067	$ 40,895	$ 37,802