FAIR VALUE - Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) - Available for sale Securities [Member] - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	[1]	$ 27,297	$ 36,212	$ 43,292
Total gains or (losses) (realized/unrealized):
Included in earnings	[1]	(387)	(628)	(388)
Included in other comprehensive income	[1]	1,586	1,623	2,404
Sales	[1]	0	0	(4,855)
Principal Repayments And Amortization	[1]	(5,582)	(10,010)	(9,364)
Purchases	[1]	0	100	5,123
Ending balance	[1]	$ 22,914	$ 27,297	$ 36,212

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