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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables) | 12 Months Ended
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Dec. 31, 2012
Accounting Policies [Abstract] |
Schedule of List of Entities Which Significant Assets Acquired and Liabilities Assumed | During 2011, 2010 and 2009, FCB acquired certain assets and assumed certain liabilities of six entities as noted below (collectively referred to as “the Acquisitions”) with the assistance of the FDIC, which had been appointed Receiver of each entity by its respective state banking authority.
Name of entity |  | Headquarters location |  | Date of transaction
Colorado Capital Bank (CCB) |  | Castle Rock, Colorado |  | July 8, 2011
United Western Bank (United Western) |  | Denver, Colorado |  | January 21, 2011
Sun American Bank (SAB) |  | Boca Raton, Florida |  | March 5, 2010
First Regional Bank (First Regional) |  | Los Angeles, California |  | January 29, 2010
Venture Bank (VB) |  | Lacey, Washington |  | September 11, 2009
Temecula Valley Bank (TVB) |  | Temecula, California |  | July 17, 2009

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