FAIR VALUE (Unrealized Losses Included in Assets Measured in Consolidated Statements of Condition at Fair Value on Recurring Basis) (Detail) - Fair Value, Inputs, Level 3 - Available-for-sale Securities [Member] $ in Thousands	3 Months Ended
	Mar. 31, 2018 USD ($)
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	$ 10,434
Asset Transfers Into Level 3	310
Sales of level 3 assets	(1,002)
Total unrealized gains (losses) included in other comprehensive income (loss)	(80)
Ending balance	$ 9,662