Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			$ 8,522	$ 8,879
Charge-offs			(1,207)	(3,180)
Recoveries			198	96
Provision for loan losses	145	1,322	145	2,728
Balance, at the end of the period	7,658	8,522	7,658	8,522
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	189		189
Amount of allowance attributed to: General portfolio allocation	7,469	8,522	7,469	8,522
Loans individually evaluated for impairment	2,866	10,774	2,866	10,774
Specific reserves to total loans individually evaluated for impairment (as a percent)			6.59%	0.00%
Loans collectively evaluated for impairment	861,972	725,102	861,972	725,102
General reserves to total loans collectively evaluated for impairment (as a percent)			0.87%	1.18%
Total gross loans	864,838	735,876	864,838	735,876	739,254
Total allowance to gross loans (as a percent)			0.89%	1.16%
Multi-Family and Non-Owner Occupied Commercial Real Estate Loans
Allowance for Loan Losses
Actual trailing period considered for determination of allowance for loan losses factor			24 months
Trailing period considered for determination of allowance for loan losses factor			12 months
Annualized trailing period considered for determination of allowance for loan losses factor			6 months
Period considered for comparison of allowance for loan losses factor			10 years
Period considered for comparison of entity's allowance for loan losses factor			15 years
Trailing period considered for comparison of allowance for loan losses factor			12 months
Owner Occupied Commercial Real Estate Loans, Commercial and Industrial Loans and SBA Loans
Allowance for Loan Losses
Actual trailing period considered for determination of allowance for loan losses factor			24 months
Trailing period considered for determination of allowance for loan losses factor			12 months
Annualized trailing period considered for determination of allowance for loan losses factor			6 months
Period considered for comparison of allowance for loan losses factor			10 years
Period considered for comparison of entity's allowance for loan losses factor			15 years
Trailing period considered for comparison of allowance for loan losses factor			12 months
One-to-Four Family and Consumer Loans
Allowance for Loan Losses
Actual trailing period considered for determination of allowance for loan losses factor			24 months
Trailing period considered for determination of allowance for loan losses factor			12 months
Annualized trailing period considered for determination of allowance for loan losses factor			6 months
Period considered for comparison of allowance for loan losses factor			10 years
Period considered for comparison of entity's allowance for loan losses factor			15 years
Trailing period considered for comparison of allowance for loan losses factor			12 months
Multi-family
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			2,281	2,730
Charge-offs				(489)
Provision for loan losses			(184)	872
Balance, at the end of the period	2,097	3,113	2,097	3,113
Other disclosures
Amount of allowance attributed to: General portfolio allocation	2,097	3,113	2,097	3,113
Loans individually evaluated for impairment	1,394	1,433	1,394	1,433
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	172,090	210,081	172,090	210,081
General reserves to total loans collectively evaluated for impairment (as a percent)			1.22%	1.48%
Total gross loans	173,484	211,514	173,484	211,514	193,830
Total allowance to gross loans (as a percent)			1.21%	1.47%
Commercial non-owner occupied
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			1,287	1,580
Charge-offs			(88)	(43)
Recoveries			2
Provision for loan losses			835	(119)
Balance, at the end of the period	2,036	1,418	2,036	1,418
Other disclosures
Amount of allowance attributed to: General portfolio allocation	2,036	1,418	2,036	1,418
Loans individually evaluated for impairment	460	2,457	460	2,457
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	261,586	162,340	261,586	162,340
General reserves to total loans collectively evaluated for impairment (as a percent)			0.78%	0.87%
Total gross loans	262,046	164,797	262,046	164,797	164,341
Total allowance to gross loans (as a percent)			0.78%	0.86%
One-to-four family
Allowance for Loan Losses
Period considered for comparison of allowance for loan losses factor			10 years
Period considered for comparison of entity's allowance for loan losses factor			15 years
Trailing period considered for comparison of allowance for loan losses factor			12 months
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			931	332
Charge-offs			(305)	(1,080)
Recoveries			7
Provision for loan losses			(215)	1,419
Balance, at the end of the period	418	671	418	671
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	153		153
Amount of allowance attributed to: General portfolio allocation	265	671	265	671
Loans individually evaluated for impairment	643	1,218	643	1,218
Specific reserves to total loans individually evaluated for impairment (as a percent)			23.79%	0.00%
Loans collectively evaluated for impairment	62,128	61,420	62,128	61,420
General reserves to total loans collectively evaluated for impairment (as a percent)			0.43%	1.09%
Total gross loans	62,771	62,638	62,771	62,638	60,027
Total allowance to gross loans (as a percent)			0.67%	1.07%
Construction
Other disclosures
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%
Loans collectively evaluated for impairment	308		308
General reserves to total loans collectively evaluated for impairment (as a percent)			0.00%
Total gross loans	308		308
Total allowance to gross loans (as a percent)			0.00%
Land
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			39
Charge-offs			(5)	(164)
Provision for loan losses			(34)	164
Other disclosures
Loans individually evaluated for impairment		198		198
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	11,005	8,298	11,005	8,298
General reserves to total loans collectively evaluated for impairment (as a percent)			0.00%	0.00%
Total gross loans	11,005	8,496	11,005	8,496	6,438
Total allowance to gross loans (as a percent)			0.00%	0.00%
Commercial owner occupied
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			1,119	1,687
Charge-offs			(405)	(98)
Provision for loan losses			437	(378)
Balance, at the end of the period	1,151	1,211	1,151	1,211
Other disclosures
Amount of allowance attributed to: General portfolio allocation	1,151	1,211	1,151	1,211
Loans individually evaluated for impairment		2,760		2,760
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	148,139	161,508	148,139	161,508
General reserves to total loans collectively evaluated for impairment (as a percent)			0.78%	0.75%
Total gross loans	148,139	164,268	148,139	164,268	152,299
Total allowance to gross loans (as a percent)			0.78%	0.74%
Commercial and industrial
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			1,361	2,356
Charge-offs			(270)	(1,082)
Recoveries			2	1
Provision for loan losses			(269)	(17)
Balance, at the end of the period	824	1,258	824	1,258
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	36		36
Amount of allowance attributed to: General portfolio allocation	788	1,258	788	1,258
Loans individually evaluated for impairment	60	1,983	60	1,983
Specific reserves to total loans individually evaluated for impairment (as a percent)			60.00%	0.00%
Loans collectively evaluated for impairment	88,045	72,451	88,045	72,451
General reserves to total loans collectively evaluated for impairment (as a percent)			0.89%	1.74%
Total gross loans	88,105	74,434	88,105	74,434	86,684
Total allowance to gross loans (as a percent)			0.94%	1.69%
Warehouse
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			1,347
Provision for loan losses			(301)	721
Balance, at the end of the period	1,046	721	1,046	721
Other disclosures
Amount of allowance attributed to: General portfolio allocation	1,046	721	1,046	721
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	112,053	42,644	112,053	42,644
General reserves to total loans collectively evaluated for impairment (as a percent)			0.93%	1.69%
Total gross loans	112,053	42,644	112,053	42,644	67,518
Total allowance to gross loans (as a percent)			0.93%	1.69%
SBA
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			80	145
Charge-offs			(132)	(76)
Recoveries			162	17
Provision for loan losses			(44)	11
Balance, at the end of the period	66	97	66	97
Other disclosures
Amount of allowance attributed to: General portfolio allocation	66	97	66	97
Loans individually evaluated for impairment	309	725	309	725
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	4,427	4,145	4,427	4,145
General reserves to total loans collectively evaluated for impairment (as a percent)			1.49%	2.34%
Total gross loans	4,736	4,870	4,736	4,870	4,727
Total allowance to gross loans (as a percent)			1.39%	1.99%
Other loans
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			77	49
Charge-offs			(2)	(148)
Recoveries			25	11
Provision for loan losses			(80)	121
Balance, at the end of the period	20	33	20	33
Other disclosures
Amount of allowance attributed to: General portfolio allocation	20	33	20	33
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	2,191	2,215	2,191	2,215
General reserves to total loans collectively evaluated for impairment (as a percent)			0.91%	1.49%
Total gross loans	$ 2,191	$ 2,215	$ 2,191	$ 2,215	$ 3,390
Total allowance to gross loans (as a percent)			0.91%	1.49%