NON-COVERED LOANS AND ALLOWANCE FOR LOAN LOSSES (Details 9) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013 contract		Mar. 31, 2012 contract
Residential
Disclosures on loans modified as TDRs that subsequently defaulted
Period beyond which a TDR generally becomes delinquent	90 days
Residential | Residential Single-family
Disclosures on loans modified as TDRs that subsequently defaulted
Number of contracts modified as TDRs that subsequently defaulted	2
Balance of loans modified as TDRs that subsequently defaulted	$ 2,830	[1]
Residential | Residential Multifamily
Disclosures on loans modified as TDRs that subsequently defaulted
Number of contracts modified as TDRs that subsequently defaulted			2
Balance of loans modified as TDRs that subsequently defaulted			1,109
Commercial Real Estate ("CRE")
Disclosures on loans modified as TDRs that subsequently defaulted
Period beyond which a TDR generally becomes delinquent	30 days
Commercial Real Estate ("CRE") | Construction
Disclosures on loans modified as TDRs that subsequently defaulted
Number of contracts modified as TDRs that subsequently defaulted			1
Balance of loans modified as TDRs that subsequently defaulted			1,509
Commercial and Industrial ("C&I")
Disclosures on loans modified as TDRs that subsequently defaulted
Period beyond which a TDR generally becomes delinquent	30 days
Commercial and Industrial ("C&I") | Commercial Business
Disclosures on loans modified as TDRs that subsequently defaulted
Number of contracts modified as TDRs that subsequently defaulted	4		2
Balance of loans modified as TDRs that subsequently defaulted	$ 817		$ 227
Consumer
Disclosures on loans modified as TDRs that subsequently defaulted
Period beyond which a TDR generally becomes delinquent	30 days

[1] The financial impact includes charge-offs and specific reserves recorded at modification date.