FAIR VALUE - Fair Value of Assets and Liabilities Measured on Recurring Basis (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]
Beginning balance		$ 26,020	[1]	$ 31,640	[1]	$ 27,297	[2]	$ 36,212	[2]
Total gains or (losses) (realized/unrealized):
Net impairement losses on investment securites (credit component)		0	[1]	(231)	[1]	(387)	[2]	(628)	[2]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss		(477)	[1]	345	[1]	1,339	[2]	1,489	[2]
Purchases	[2]					0		100
Principal Repayments		(1,065)	[1]	(2,046)	[1]	(3,771)	[2]	(7,465)	[2]
Ending balance	[1],[2]	24,478		29,708		24,478		29,708
Available for Sale Securities
Total gains or (losses) (realized/unrealized):
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.