Loans Held for Investment (Details) (USD $)					6 Months Ended
	Jun. 30, 2013	Dec. 31, 2012	Jun. 30, 2012	Dec. 31, 2011	Jun. 30, 2013 Maximum	Jun. 30, 2013 Canyon National	Jun. 30, 2013 Palm Desert National	Jun. 30, 2013 FAB	Jun. 30, 2013 San Diego Trust Bank	Jun. 30, 2013 Business loans: Commercial and industrial	Dec. 31, 2012 Business loans: Commercial and industrial	Jun. 30, 2012 Business loans: Commercial and industrial	Dec. 31, 2011 Business loans: Commercial and industrial	Jun. 30, 2013 Business loans: Commercial owner occupied	Dec. 31, 2012 Business loans: Commercial owner occupied	Jun. 30, 2012 Business loans: Commercial owner occupied	Dec. 31, 2011 Business loans: Commercial owner occupied	Jun. 30, 2013 Business loans: SBA	Dec. 31, 2012 Business loans: SBA	Jun. 30, 2012 Business loans: SBA	Dec. 31, 2011 Business loans: SBA	Jun. 30, 2013 Business loans: Warehouse facilities	Dec. 31, 2012 Business loans: Warehouse facilities	Jun. 30, 2012 Business loans: Warehouse facilities	Dec. 31, 2011 Business loans: Warehouse facilities	Jun. 30, 2013 Real estate loans: Commercial non-owner occupied	Dec. 31, 2012 Real estate loans: Commercial non-owner occupied	Jun. 30, 2012 Real estate loans: Commercial non-owner occupied	Dec. 31, 2011 Real estate loans: Commercial non-owner occupied	Jun. 30, 2013 Real estate loans: Multi-family	Dec. 31, 2012 Real estate loans: Multi-family	Jun. 30, 2012 Real estate loans: Multi-family	Dec. 31, 2011 Real estate loans: Multi-family	Jun. 30, 2013 Real estate loans: One-to-four family	Dec. 31, 2012 Real estate loans: One-to-four family	Jun. 30, 2012 Real estate loans: One-to-four family	Dec. 31, 2011 Real estate loans: One-to-four family	Jun. 30, 2013 Real estate loans: Construction	Jun. 30, 2012 Real estate loans: Construction	Jun. 30, 2013 Real estate loans: Land	Dec. 31, 2012 Real estate loans: Land	Jun. 30, 2012 Real estate loans: Land	Dec. 31, 2011 Real estate loans: Land	Jun. 30, 2013 Other loans	Dec. 31, 2012 Other loans	Jun. 30, 2012 Other loans	Dec. 31, 2011 Other loans
Loans Held for Investment
Total gross loans	$ 1,059,957,000	$ 986,194,000	$ 798,352,000							$ 146,240,000	$ 115,354,000	$ 84,191,000		$ 201,802,000	$ 150,934,000	$ 150,428,000		$ 5,820,000	$ 6,882,000	$ 3,995,000		$ 135,317,000	$ 195,761,000	$ 61,111,000		$ 295,767,000	$ 253,409,000	$ 242,700,000		$ 172,797,000	$ 156,424,000	$ 183,742,000		$ 84,672,000	$ 97,463,000	$ 56,694,000		$ 2,135,000	$ 281,000	$ 10,438,000	$ 8,774,000	$ 11,191,000		$ 4,969,000	$ 1,193,000	$ 4,019,000
Less loans held for sale, net	3,617,000	3,681,000	2,401,000
Total gross loans held for investment	1,056,340,000	982,513,000	795,951,000
Less: Deferred loan origination costs (fees) and premiums (discounts), net	(910,000)	(306,000)	(632,000)
Less: Allowance for loan losses	(7,994,000)	(7,994,000)	(7,658,000)	(8,522,000)						(2,079,000)	(1,310,000)	(1,250,000)	(1,361,000)	(1,741,000)	(1,512,000)	(1,076,000)	(1,119,000)	(68,000)	(79,000)	(151,000)	(80,000)	(700,000)	(1,544,000)	(908,000)	(1,347,000)	(1,508,000)	(1,459,000)	(1,667,000)	(1,287,000)	(541,000)	(1,145,000)	(2,284,000)	(2,281,000)	(1,139,000)	(862,000)	(303,000)	(931,000)			(180,000)	(31,000)		(39,000)	(38,000)	(52,000)	(19,000)	(77,000)
Loans held for investment, net	1,047,436,000	974,213,000	787,661,000
Mark-to-market discount						2,100,000	4,000,000		560,000
Mark-to-market premium								103,000
Secured loans limit to one borrower (as a percent)					25.00%
Unsecured loans limit to one borrower (as a percent)					15.00%
Secured loans limit to one borrower	45,200,000
Unsecured loans limit to one borrower	27,100,000
Aggregate outstanding balance of loans to one borrower of secured credit	$ 35,000,000