ACQUISITIONS (Details) (USD $)						0 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Aug. 01, 2012 American Perspective	Apr. 03, 2012 Celtic	Jan. 03, 2012 PWE Finance	Aug. 20, 2010 Los Padres Bank	Aug. 01, 2012 Pacific Western Bank American Perspective item	Apr. 03, 2012 Pacific Western Bank Celtic Maximum
Assets Acquired:
Cash and due from banks			$ 3,370,000	$ 3,435,000	$ 7,092,000	$ 26,615,000
Interest-earning deposits in other financial institutions			10,081,000			751,000
Cash received from the FDIC						144,000,000
Investment securities available-for-sale			48,887,000			33,604,000
FHLB stock			1,412,000			10,647,000
Loans and leases:
Not covered by loss-sharing			197,279,000	54,963,000	140,959,000	828,000
Covered by loss-sharing						436,291,000
Other real estate owned:
Not covered by loss-sharing			1,561,000
Covered by loss-sharing						33,913,000
FDIC loss sharing asset						78,814,000
Goodwill			15,047,000	6,645,000	19,033,000	39,141,000
Core deposit and customer relationship intangibles			1,924,000	1,300,000	1,700,000	2,189,000
Other intangible assets				670,000	1,420,000
Leases in process					19,162,000
Other assets			4,234,000	69,000	467,000	17,290,000
Total assets acquired			283,795,000	67,082,000	189,833,000	824,083,000
Liabilities Assumed:
Noninterest-bearing deposits			40,673,000			33,722,000
Interest-bearing deposits			178,891,000			718,463,000
Borrowings from parent					128,677,000
Other borrowings			5,315,000	46,804,000	15,839,000	70,013,000
Accrued interest payable and other liabilities			840,000	2,278,000	10,317,000	1,885,000
Total liabilities assumed			225,719,000	49,082,000	154,833,000	824,083,000
Consideration paid
Cash consideration paid			58,076,000	18,000,000	35,000,000
Deposit premium paid						3,393,000
Net investment in direct financing leases and leases in process					160,100,000
Gross loans outstanding	2,981,071,000	2,722,400,000	197,300,000	55,000,000
Other outstanding debt and liabilities					26,200,000
Assumed outstanding debt and other liabilities				46,800,000
Loan market considered in granting loan								5,000,000
Number of branches							2
Deposits	$ 4,709,121,000	$ 4,577,453,000	$ 219,600,000