FAIR VALUE - Change in unrealized losses included in earnings (Detail) - USD ($) $ in Thousands	3 Months Ended				9 Months Ended
	Sep. 30, 2016		Sep. 30, 2015		Sep. 30, 2016		Sep. 30, 2015
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Net impairement losses on investment securites (credit component)	$ 0	[1]	$ (231)	[1]	$ (387)	[2]	$ (628)	[2]
Available for Sale Securities
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Net impairement losses on investment securites (credit component)	$ 0		$ (231)		$ (387)		$ (628)

[1] Amounts mostly related to private label mortgage-backed securities.

[2] Amounts mostly related to private label mortgage-backed securities.