OTHER NON-INTEREST INCOME AND OTHER NON-INTEREST EXPENSE (Selected Components of Other Non-Interest Income And Other Non-Interest Expense) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Other Income and Expenses [Abstract]
Letter of credit fees	$ 847	$ 888	$ 790
Extension fees	568	559	503
Other income	4,916	5,312	5,521
Total other non-interest income	6,331	6,759	6,814
Professional fees	4,492	4,840	4,819
Other real estate owned	17	19	76
Postage and delivery	1,179	1,155	1,173
Communications	1,502	1,583	1,587
Loss on FHLB redemption	1,275	3,167	0
Other expenses	11,171	9,998	10,896
Total other non-interest expense	$ 19,636	$ 20,762	$ 18,551