COVERED LOANS AND FDIC SHARED-LOSS ASSET (Details 4) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Balance, end of period	$ 45,345	$ 68,083
Covered Loans
Balance, beginning of period	68,083	16,725
Acquisition		70,293
FDIC share of additional losses	1,819	2,929
Cash payments received from FDIC	(21,288)	(22,051)
Net accretion	(3,269)	187
Balance, end of period	45,345	68,083
Covered Loans | Western Commercial
Balance, beginning of period	9,159	16,725
Acquisition
FDIC share of additional losses	520	740
Cash payments received from FDIC	(3,926)	(8,379)
Net accretion	(287)	73
Balance, end of period	5,466	9,159
Covered Loans | San Luis Trust Bank (SLTB)
Balance, beginning of period	58,924
Acquisition		70,293
FDIC share of additional losses	1,299	2,189
Cash payments received from FDIC	(17,362)	(13,672)
Net accretion	(2,982)	114
Balance, end of period	$ 39,879	$ 58,924