NON-COVERED LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 12) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Allowance for loan losses disclosures
Allowance on covered loans	$ 8,665,000		$ 8,665,000		$ 5,153,000
Percentage of allowance allocated to covered loans	3.60%		3.60%
Provision for covered loans	(964,000)	5,179,000	4,848,000	5,705,000
Percentage of income from covered loans under loss-sharing agreements with the FDIC	80.00%		80.00%
Covered loans accounted for under ASC 310-30
Allowance for loan losses disclosures
Provision for covered loans			2,300,000
Covered loans accounted for under ASC 310-30 | Commercial Real Estate ("CRE")
Allowance for loan losses disclosures
Allowance on covered loans	2,300,000		2,300,000
Specific covered loans outside of the scope of ASC 310-30
Allowance for loan losses disclosures
Allowance allocated to additional advances	6,400,000		6,400,000		5,200,000
Percentage of allowance allocated to covered loans	2.60%		2.60%		2.20%
Provision for covered loans	(772,000)	5,200,000	2,500,000	5,700,000
Charge-offs	0	6,500,000	1,300,000	6,500,000
Income from covered loans under loss-sharing agreements with the FDIC		5,200,000	1,100,000
Percentage of income from covered loans under loss-sharing agreements with the FDIC	80.00%	80.00%	80.00%	80.00%
Net impact to earnings due to charge-offs		1,300,000	267,000
Specific covered loans outside of the scope of ASC 310-30 | Commercial Real Estate ("CRE")
Allowance for loan losses disclosures
Allowance allocated to additional advances	$ 2,200,000		$ 2,200,000		$ 2,500,000