GOODWILL AND OTHER INTANGIBLES - Gross Amount and Accumulated Amortization of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Finite Lived Intangible Assets [Line Items]
Gross amount	$ 24,500
Accumulated amortization	(954)	0
Net carrying amount	23,511	0
Remaining amortization period	9.0
Goodwill and other Intangible Assets [Abstract]
2013	6,078
2014	5,735
2015	4,118
2016	3,810
2017 and after	13,105
Core Deposits [Member]
Finite Lived Intangible Assets [Line Items]
Gross amount	45,844	45,844
Accumulated amortization	(36,509)	(34,155)
Net carrying amount	9,335	11,689
Remaining amortization period	P10Y4M24D	P11Y6M0D
Purchased Credit Card Relationship Intangible [Member]
Finite Lived Intangible Assets [Line Items]
Gross amount	$ 24,465	$ 0
Remaining amortization period	P9Y0M0D