CREDIT QUALITY ASSESSMENT (Summary of Impaired Loans) (Detail) - USD ($) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2016	Dec. 31, 2015
Credit Quality Assessment [Abstract]
Impaired loans with a specific allowance	$ 12,116	$ 14,208
Impaired loans without a specific allowance	12,181	14,719
Total impaired loans	24,297	28,927
Allowance for loan and lease losses related to impaired loans	3,652	3,375
Allowance for loan and lease losses related to loans collectively evaluated	40,290	37,520
Total allowance for loan and lease losses	43,942	40,895
Average impaired loans for the period	26,955	29,828
Contractual interest income due on impaired loans during the period	1,793	2,527
Interest income on impaired loans recognized on a cash basis	709	961
Interest income on impaired loans recognized on an accrual basis	$ 153	$ 274