FAIR VALUE - Change in unrealized losses included in earnings (Detail) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended
		Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Included in earnings	[1]			$ 0	$ (387)
Available for Sale Securities
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Included in earnings		$ 0	$ 0	$ 0	$ (387)

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