INVESTMENTS (Gross Realized Gains and Losses on All Investments) (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Investments [Abstract]
Gross realized gains from sales of investments available-for-sale	$ 2,519	$ 0	$ 1,491
Gross realized losses from sales of investments available-for-sale	(2,343)	0	0
Net gains or (losses) from calls of investments available-for-sale	14	32	440
Net gains or (losses) from calls of investments held-to-maturity	0	0	1
Gross realized gains from sales of equity securities	0	1,241	0
Net securities gains	$ 190	$ 1,273	$ 1,932