ALLOWANCE FOR LOAN AND LEASE LOSSES - Additional Information (Details) (USD $)	3 Months Ended					6 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011
Financing Receivable, Allowance for Credit Losses [Line Items]
Provision for loan and lease losses	$ (8,283,000)	$ 9,042,000	$ 5,283,000	$ 6,622,000	$ 6,047,000	$ 759,000	$ 18,998,000
Net charge-offs	4,300,000				3,900,000	13,000,000	13,500,000
FDIC loss sharing income	(7,384,000)				8,280,000	1,550,000	21,096,000
Allowance for covered loan losses	32,961,000	45,496,000	45,190,000	48,895,000	48,327,000	32,961,000	48,327,000	46,156,000	42,835,000
Loss sharing expense	1,578,000				3,085,000	3,864,000	4,836,000
Gains Losses on Sales of Covered Other Real Estate	2,212,000				(1,233,000)	2,369,000	(2,525,000)
Commercial Loan [Member]
Financing Receivable, Allowance for Credit Losses [Line Items]
Allowance threshold for impaired and non-impaired commercial loans						250,000
Commercial Loan [Member] | Non Covered Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum						250,000
Residential Portfolio Segment [Member] | Non Covered Loans
Financing Receivable, Allowance for Credit Losses [Line Items]
Restructured Loans, Loan Relationships, Review Threshold Amount Minimum						$ 100,000