FAIR VALUE (Unrealized Losses Included in Assets Measured in Consolidated Statements of Condition at Fair Value on Recurring Basis) (Detail) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Principal Redemption	$ (227,419)	$ (66,727)
Fair Value, Inputs, Level 3 | Available-for-sale Securities [Member]
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Balance at January 1, 2016	1,023
Asset Transfers Into Level 3	2,116
Purchases of Level 3 assets	7,000
Total unrealized losses included in other comprehensive income (loss)	230
Balance at September 30, 2016	$ 10,369