Acquisitions (Details) (USD $)	12 Months Ended				0 Months Ended				0 Months Ended			0 Months Ended		0 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Acquired Loans	Jun. 25, 2013 San Diego Trust Bank item	Jun. 25, 2013 San Diego Trust Bank Maximum	Jun. 25, 2013 San Diego Trust Bank As initially reported	Jun. 25, 2013 San Diego Trust Bank Fair Value Adjustments	Mar. 15, 2013 First Association Bank item	Mar. 15, 2013 First Association Bank As initially reported	Mar. 15, 2013 First Association Bank Fair Value Adjustments	Apr. 27, 2012 Palm Desert National item	Apr. 27, 2012 Palm Desert National As initially reported	Feb. 11, 2011 Canyon National item	Feb. 11, 2011 Canyon National As initially reported
Acquisitions
Cash consideration					$ 16,200,000				$ 43,000,000
Number of shares of common stock issued as consideration					1,198,255				1,279,217
Number of entities in business combination					2				2
Number of branches acquired												1		3
Deposit transaction accounts													50,100,000
Retail certificates of deposit													30,800,000
Whole sale certificates of deposits													34,100,000
ASSETS ACQUIRED
Cash and cash equivalents					30,252,000		30,252,000		167,663,000	167,663,000		22,071,000	39,500,000	13,167,000
Investment securities					124,805,000		124,960,000	(155,000)	222,391,000	219,913,000	2,478,000		1,500,000		12,800,000
Securities available for sale												100,000		12,753,000
Federal Reserve Bank and Federal Home Loan Bank stock												1,390,000		1,323,000
Loans, gross					42,722,000		42,945,000	(223,000)	26,422,000	26,264,000	158,000	63,772,000	63,800,000	149,740,000
Allowance for loan losses							(1,013,000)	1,013,000		(224,000)	224,000
Other real estate owned					752,000		752,000					11,533,000	11,500,000	11,953,000
Core deposit intangible					2,836,000			2,836,000	1,930,000		1,930,000	840,000	840,000	2,270,000	2,300,000
Accrued interest receivable and other assets												3,658,000		1,640,000
Other assets					9,856,000		9,856,000		5,823,000	5,823,000			3,800,000		1,500,000
Total Assets Acquired					211,223,000		207,752,000	3,471,000	424,229,000	419,439,000	4,790,000	103,364,000	120,900,000	192,846,000
LIABILITIES ASSUMED
Deposits					183,907,000		183,901,000	6,000	356,818,000	356,737,000	81,000	115,582,000		204,678,000
Borrowings									16,905,000	16,905,000
Deferred tax liability (asset)					1,174,000		(333,000)	1,507,000	3,918,000		3,918,000		2,400,000		1,900,000
Other liabilities					1,094,000		1,823,000	(729,000)	536,000	536,000		29,000	578,000	39,000
Total Liabilities Assumed					186,175,000		185,391,000	784,000	378,177,000	374,178,000	3,999,000	115,611,000	118,000,000	204,717,000
Excess of assets acquired over liabilities assumed					25,048,000		22,361,000	2,687,000	46,052,000	45,261,000	791,000	(12,247,000)		(11,871,000)
Consideration paid					30,622,000				57,906,000
Goodwill recognized	17,428,000				5,574,000				11,854,000
Cash received from FDIC	138,424,000	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
Total purchase credit impaired loans	1,977,000	6,319,000	6,488,000		0				0
Extension period for measurement of fair values						1 year
Contractual amounts due, expected cash flows to be collected, interest component and fair value as of the respective acquisition dates
Contractual amounts due				79,358,000
Expected cash flows				79,358,000
Interest component of expected cash flows				10,543,000
Fair value of acquired loans				68,815,000
Pro forma net interest and other income, net income and earnings per share
Net interest and other income	72,021,000	71,606,000
Net income	$ 9,852,000	$ 18,713,000
Basic earnings per share (in dollars per share)	$ 0.62	$ 1.43
Diluted earnings per share (in dollars per share)	$ 0.59	$ 1.39