GOODWILL AND OTHER INTANGIBLES - Additional Information (Detail) (USD $)	9 Months Ended				3 Months Ended		9 Months Ended		12 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013	Jun. 30, 2012	Sep. 30, 2014 Purchased Credit Card Relationship Intangible [Member]	Sep. 30, 2013 Purchased Credit Card Relationship Intangible [Member]	Sep. 30, 2014 Purchased Credit Card Relationship Intangible [Member]	Sep. 30, 2013 Purchased Credit Card Relationship Intangible [Member]	Dec. 31, 2013 Purchased Credit Card Relationship Intangible [Member]	Sep. 30, 2014 Core Deposits [Member]	Sep. 30, 2013 Core Deposits [Member]	Sep. 30, 2014 Core Deposits [Member]	Sep. 30, 2013 Core Deposits [Member]	Dec. 31, 2013 Core Deposits [Member]
Finite Lived Intangible Assets [Line Items]
Goodwill	$ 28,100,000		$ 28,100,000
Purchase credit card relationship intangible amount				24,500,000	24,465,000		24,465,000		24,465,000	45,844,000		45,844,000		45,844,000
Amortization period of purchased credit card relationship intangible					7 years 3 months 18 days				8 years 0 months 0 days	8 years 8 months 12 days				9 years 9 months 18 days
Amortization expense	$ 3,723,000	$ 4,558,000			$ 800,000	$ 900,000	$ 2,600,000	$ 2,800,000		$ 400,000	$ 600,000	$ 1,200,000	$ 1,800,000