LOAN PORTFOLIO - Accretable Yield Related to Credit Card Portfolio from FIA (Detail) (PCI Loans [Member], USD $) In Thousands, unless otherwise specified	Sep. 30, 2012
PCI Loans [Member]
Accretable Yield [Line Items]
Accretable yield at acquisition	$ 3,451
Accretion recognized in earnings	(740)
Accretable yield as of September 30, 2012	$ 2,711