INVESTMENTS (Gross Realized Gains and Losses on All Investments) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Investments [Abstract]
Gross realized gains from sales of investments available-for-sale	$ 1,491	$ 0	$ 0
Net gains or (losses) from calls of investments available-for-sale	440	18	2
Net gains or (losses) from calls of investments held-to-maturity	1	18	3
Net securities gains	$ 1,932	$ 36	$ 5