Acquisitions (Details) (USD $)	12 Months Ended		0 Months Ended		0 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Apr. 27, 2012 Palm Desert National item	Apr. 27, 2012 Palm Desert National Previously reported	Feb. 11, 2011 Canyon National item	Feb. 11, 2011 Canyon National Previously reported
Acquisitions
Number of branches acquired			1		3
Investment securities				$ 1,500,000		$ 12,800,000
Other assets				3,800,000		1,500,000
Deposit transaction accounts				50,100,000
Retail certificates of deposit				30,800,000
Whole sale certificates of deposits				34,100,000
Deferred tax liability				2,400,000		1,900,000
Assets
Cash and cash equivalents			22,071,000	39,500,000	13,167,000	13,200,000
Securities available for sale			100,000		12,753,000
Federal Reserve Bank and Federal Home Loan Bank stock			1,390,000		1,323,000	1,300,000
Loans			63,772,000	63,800,000	149,740,000	149,700,000
Other real estate owned			11,533,000	11,500,000	11,953,000	12,000,000
Core deposit intangibles			840,000	840,000	2,270,000	2,300,000
Accrued interest receivable and other assets			3,658,000		1,640,000
Assets			103,364,000	120,900,000	192,846,000	208,900,000
Liabilities
Deposits			115,582,000		204,678,000	204,700,000
Other liabilities			29,000	578,000	39,000	39,000
Liabilities			115,611,000	118,000,000	204,717,000	206,600,000
Excess of liabilities assumed over assets acquired			12,247,000		11,871,000
Cash received from FDIC	39,491,000	26,389,000	17,420,000		13,222,000
FDIC receivable			167,000		2,838,000	16,100,000
Recorded gain on acquisition	$ 5,340,000	$ 4,189,000	$ 5,340,000		$ 4,189,000