FAIR VALUE - Fair Value of Assets and Liabilities Measured on Recurring Basis (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Total gains or (losses) (realized/unrealized):
Included in earnings	$ 156		$ 0
Principal Repayments	(2,461)	[1]	(1,869)	[1]
Available for Sale Securities
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation [Line Items]
Beginning balance	36,212	[1]	43,292	[1]
Total gains or (losses) (realized/unrealized):
Included in earnings	156	[1]	0	[1]
Included in other comprehensive income	(619)	[1]	(964)	[1]
Purchases	100	[1]	5,123	[1]
Ending balance	$ 34,314	[1]	$ 47,510	[1]

[1] Amounts mostly related to private label MBS.