GOODWILL AND OTHER INTANGIBLES - Gross Amount and Accumulated Amortization of Other Intangible Assets (Detail) (USD $) In Thousands, unless otherwise specified		3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Jun. 30, 2012	Sep. 30, 2014 Core Deposits [Member]	Dec. 31, 2013 Core Deposits [Member]	Sep. 30, 2014 Purchased Credit Card Relationship Intangible [Member]	Dec. 31, 2013 Purchased Credit Card Relationship Intangible [Member]
Finite Lived Intangible Assets [Line Items]
Gross amount	$ 24,500	$ 45,844	$ 45,844	$ 24,465	$ 24,465
Accumulated amortization		(40,034)	(38,863)	(7,230)	(4,678)
Net carrying amount		$ 5,810	$ 6,981	$ 17,235	$ 19,787
Remaining amortization period		8 years 8 months 12 days	9 years 9 months 18 days	7 years 3 months 18 days	8 years 0 months 0 days