NON-COVERED LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 12) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Allowance for loan losses disclosures
Allowance on covered loans	$ 9,629,000		$ 9,629,000		$ 5,153,000
Percentage of allowance allocated to covered loans	4.00%		4.00%
Provision for covered loans	723,000	(1,095,000)	5,812,000	526,000
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			2,500,000
Covered loans accounted for under ASC 310-30 | Commercial Real Estate ("CRE")
Allowance for loan losses disclosures
Allowance on covered loans	2,500,000		2,500,000
Specific covered loans outside of the scope of ASC 310-30
Allowance for loan losses disclosures
Allowance allocated to additional advances	7,100,000		7,100,000		5,200,000
Percentage of allowance allocated to covered loans	2.90%		2.90%		2.20%
Provision for covered loans	186,000	(1,100,000)	3,300,000	526,000
Charge-offs	1,200,000	0	1,300,000	0
Income from covered loans under loss-sharing agreements with the FDIC			1,100,000
Percentage of income from covered loans under loss-sharing agreements with the FDIC	80.00%		80.00%
Net impact to earnings due to charge-offs			267,000
Specific covered loans outside of the scope of ASC 310-30 | Commercial and Industrial ("C&I")
Allowance for loan losses disclosures
Allowance allocated to additional advances	4,100,000		4,100,000		2,400,000
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	$ 2,400,000		$ 2,400,000		$ 2,500,000