NON-COVERED LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 8) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Performing loan
Troubled debt restructuring disclosures
Loan balance of restructured loans	$ 80,500	$ 99,600
Nonperforming loan
Troubled debt restructuring disclosures
Loan balance of restructured loans	9,800	38,900
A/B Note Splits | Performing loan
Troubled debt restructuring disclosures
Loan balance of restructured loans	31,400	22,800
Residential | Performing loan
Troubled debt restructuring disclosures
Loan balance of restructured loans	28,700	19,100
Residential | Nonperforming loan
Troubled debt restructuring disclosures
Loan balance of restructured loans	5,800	2,700
Residential | Modifications using principal and/or interest deferment, and/or rate reduction
Troubled debt restructuring disclosures
Loan balance of restructured loans	9,900
Residential | Modifications using extensions and/or A/B note splits
Troubled debt restructuring disclosures
Loan balance of restructured loans	9,200
Commercial Real Estate ("CRE") | Performing loan
Troubled debt restructuring disclosures
Loan balance of restructured loans	46,700	60,200
Commercial Real Estate ("CRE") | Nonperforming loan
Troubled debt restructuring disclosures
Loan balance of restructured loans	2,100	34,600
Commercial Real Estate ("CRE") | TDR (Types of Modifications)
Troubled debt restructuring disclosures
Loan balance of restructured loans	8,500
Commercial and Industrial ("C&I") | Performing loan
Troubled debt restructuring disclosures
Loan balance of restructured loans	5,000	20,300
Commercial and Industrial ("C&I") | Nonperforming loan
Troubled debt restructuring disclosures
Loan balance of restructured loans	1,900	1,600
Commercial and Industrial ("C&I") | TDR (Types of Modifications)
Troubled debt restructuring disclosures
Loan balance of restructured loans	5,600
Consumer | Performing loan
Troubled debt restructuring disclosures
Loan balance of restructured loans	108
Consumer | TDR (Types of Modifications)
Troubled debt restructuring disclosures
Loan balance of restructured loans	$ 108