COVERED LOANS AND FDIC SHARED LOSS ASSET (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012 Western Commercial	Dec. 31, 2012 San Luis Trust Bank (SLTB)	Feb. 18, 2011 San Luis Trust Bank (SLTB)	Dec. 31, 2012 Covered Loans	Dec. 31, 2012 Covered Loans Home mortgage	Dec. 31, 2012 Covered Loans Commercial mortgage	Dec. 31, 2012 Covered Loans Construction and land loans	Dec. 31, 2012 Covered Loans Multifamily	Dec. 31, 2012 Covered Loans Commercial loans and lines	Dec. 31, 2012 Covered Loans Home equity loans and lines of credit	Dec. 31, 2012 Covered Loans Installment and credit card	Nov. 05, 2010 Covered Loans Western Commercial	Nov. 05, 2010 Covered Loans Western Commercial Home mortgage	Nov. 05, 2010 Covered Loans Western Commercial Commercial mortgage	Nov. 05, 2010 Covered Loans Western Commercial Construction and land loans	Nov. 05, 2010 Covered Loans Western Commercial Multifamily	Nov. 05, 2010 Covered Loans Western Commercial Commercial loans and lines	Nov. 05, 2010 Covered Loans Western Commercial Home equity loans and lines of credit	Nov. 05, 2010 Covered Loans Western Commercial Installment and credit card	Feb. 18, 2011 Covered Loans San Luis Trust Bank (SLTB) Home mortgage	Feb. 18, 2011 Covered Loans San Luis Trust Bank (SLTB) Commercial mortgage	Feb. 18, 2011 Covered Loans San Luis Trust Bank (SLTB) Construction and land loans	Feb. 18, 2011 Covered Loans San Luis Trust Bank (SLTB) Multifamily	Feb. 18, 2011 Covered Loans San Luis Trust Bank (SLTB) Commercial loans and lines	Feb. 18, 2011 Covered Loans San Luis Trust Bank (SLTB) Home equity loans and lines of credit	Feb. 18, 2011 Covered Loans San Luis Trust Bank (SLTB) Installment and credit card	Feb. 18, 2011 Covered Loans San Luis Trust Bank (SLTB) Total
Total	$ 55,000	$ 138,792	$ 138,792	$ 194,281	$ 67,008	$ 41,868	$ 30,994	$ 18,450	$ 21,839	$ 13,669	$ 453	$ 55,489	$ 2,484	$ 25,920	$ 7,599		$ 19,486			$ 64,524	$ 15,948	$ 23,395	$ 18,450	$ 2,353	$ 13,669	$ 453	$ 138,792