Loans Held for Investment (Details 5) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2012 grade area	Dec. 31, 2011	Sep. 30, 2011
Loans Held for Investment
Number of areas where the entity's credit quality is maintained and credit risk managed	2
Number of Pass scale grades	6
Credit Risk Grades
Total Gross Loans	$ 864,838	$ 739,254	$ 735,876
Real estate loans: Multi-family
Credit Risk Grades
Total Gross Loans	173,484	193,830	211,514
Real estate loans: Commercial non-owner occupied
Credit Risk Grades
Total Gross Loans	262,046	164,341	164,797
Real estate loans: One-to-four family
Credit Risk Grades
Total Gross Loans	62,771	60,027	62,638
Real estate loans: Construction
Credit Risk Grades
Total Gross Loans	308
Real estate loans: Land
Credit Risk Grades
Total Gross Loans	11,005	6,438	8,496
Business loans: Commercial owner occupied
Credit Risk Grades
Total Gross Loans	148,139	152,299	164,268
Business loans: Commercial and industrial
Credit Risk Grades
Total Gross Loans	88,105	86,684	74,434
Business loans: Warehouse facilities
Credit Risk Grades
Total Gross Loans	112,053	67,518	42,644
Business loans: SBA
Credit Risk Grades
Total Gross Loans	4,736	4,727	4,870
Other loans
Credit Risk Grades
Total Gross Loans	2,191	3,390	2,215
Pass
Credit Risk Grades
Total Gross Loans	835,247	698,433	685,351
Pass | Real estate loans: Multi-family
Credit Risk Grades
Total Gross Loans	170,365	176,477	193,593
Pass | Real estate loans: Commercial non-owner occupied
Credit Risk Grades
Total Gross Loans	252,216	160,051	158,863
Pass | Real estate loans: One-to-four family
Credit Risk Grades
Total Gross Loans	61,378	57,685	57,661
Pass | Real estate loans: Construction
Credit Risk Grades
Total Gross Loans	308
Pass | Real estate loans: Land
Credit Risk Grades
Total Gross Loans	9,009	6,386	6,018
Pass | Business loans: Commercial owner occupied
Credit Risk Grades
Total Gross Loans	133,414	138,975	150,986
Pass | Business loans: Commercial and industrial
Credit Risk Grades
Total Gross Loans	86,000	83,441	68,693
Pass | Business loans: Warehouse facilities
Credit Risk Grades
Total Gross Loans	112,053	67,518	42,644
Pass | Business loans: SBA
Credit Risk Grades
Total Gross Loans	8,330	4,548	4,710
Pass | Other loans
Credit Risk Grades
Total Gross Loans	2,174	3,352	2,183
Special Mention
Credit Risk Grades
Total Gross Loans	4,844	20,697	23,549
Special Mention | Real estate loans: Multi-family
Credit Risk Grades
Total Gross Loans		13,286	13,835
Special Mention | Real estate loans: Commercial non-owner occupied
Credit Risk Grades
Total Gross Loans	663	676	566
Special Mention | Real estate loans: One-to-four family
Credit Risk Grades
Total Gross Loans			1,948
Special Mention | Business loans: Commercial owner occupied
Credit Risk Grades
Total Gross Loans	3,334	5,689	5,722
Special Mention | Business loans: Commercial and industrial
Credit Risk Grades
Total Gross Loans	847	1,046	1,478
Substandard
Credit Risk Grades
Total Gross Loans	24,747	20,124	26,976
Substandard | Real estate loans: Multi-family
Credit Risk Grades
Total Gross Loans	3,119	4,067	4,086
Substandard | Real estate loans: Commercial non-owner occupied
Credit Risk Grades
Total Gross Loans	9,167	3,614	5,368
Substandard | Real estate loans: One-to-four family
Credit Risk Grades
Total Gross Loans	1,393	2,342	3,029
Substandard | Real estate loans: Land
Credit Risk Grades
Total Gross Loans	1,996	52	2,478
Substandard | Business loans: Commercial owner occupied
Credit Risk Grades
Total Gross Loans	11,391	7,635	7,560
Substandard | Business loans: Commercial and industrial
Credit Risk Grades
Total Gross Loans	1,258	2,197	4,263
Substandard | Business loans: SBA
Credit Risk Grades
Total Gross Loans	(3,594)	179	160
Substandard | Other loans
Credit Risk Grades
Total Gross Loans	$ 17	$ 38	$ 32