ALLOWANCE FOR LOAN AND LEASE LOSSES - Additional Information (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for loan and lease losses	$ 5,293,000	$ 6,622,000	$ 6,052,000	$ 25,620,000
Net charge-offs	15,000,000	6,100,000	28,000,000	19,600,000
FDIC loss sharing income	5,555,000	8,496,000	7,105,000	29,592,000
Allowance for covered loan losses	23,259,000	48,895,000	23,259,000	48,895,000	32,961,000	45,190,000	48,327,000	42,835,000
Loss sharing expense	1,724,000	3,584,000	5,588,000	8,420,000
Gains (losses) on sales of covered Other Real Estate	(204,000)	25,000	2,165,000	(2,500,000)
Commercial
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance threshold for impaired and non-impaired commercial loans			250,000
Commercial | Non Covered Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum			250,000
Real estate - residential | Non Covered Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum			$ 100,000