Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			$ 7,994	$ 8,522
Charge-offs			(1,608)	(1,207)
Recoveries			344	198
Provisions for (reduction in) loan losses	646	145	1,264	145
Balance, at the end of the period	7,994	7,658	7,994	7,658
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	104	189	104	189	665
Amount of allowance attributed to: General portfolio allocation	7,890	7,469	7,890	7,469
Loans individually evaluated for impairment	1,161	2,866	1,161	2,866
Specific reserves to total loans individually evaluated for impairment (as a percent)			8.96%	6.59%
Loans collectively evaluated for impairment	1,140,854	861,972	1,140,854	861,972
General reserves to total loans collectively evaluated for impairment (as a percent)			0.69%	0.87%
Total gross loans	1,142,015	864,838	1,142,015	864,838	986,194
Total allowance to gross loans (as a percent)			0.70%	0.89%
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			36 months
Trailing period one considered for determination of allowance for loan losses factor			24 months
Trailing period two 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 and Non-Owner Occupied Commercial Real Estate Loans
Allowance for Loan Losses
Actual trailing period considered for determination of allowance for loan losses factor			36 months
Trailing period one considered for determination of allowance for loan losses factor			24 months
Trailing period two 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			36 months
Trailing period one considered for determination of allowance for loan losses factor			24 months
Trailing period two 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
Single Family and Consumer Loans and Warehouse Repurchase Facilities
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
Commercial and industrial
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			1,310	1,361
Charge-offs			(291)	(270)
Recoveries			107	2
Provisions for (reduction in) loan losses			1,675	(269)
Balance, at the end of the period	2,801	824	2,801	824
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans		36		36	270
Amount of allowance attributed to: General portfolio allocation	2,801	788	2,801	788
Loans individually evaluated for impairment	68	60	68	60
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	60.00%
Loans collectively evaluated for impairment	173,652	88,045	173,652	88,045
General reserves to total loans collectively evaluated for impairment (as a percent)			1.61%	0.89%
Total gross loans	173,720	88,105	173,720	88,105	115,354
Total allowance to gross loans (as a percent)			1.61%	0.94%
Commercial owner occupied
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			1,512	1,119
Charge-offs			(163)	(405)
Provisions for (reduction in) loan losses			170	437
Balance, at the end of the period	1,519	1,151	1,519	1,151
Other disclosures
Amount of allowance attributed to: General portfolio allocation	1,519	1,151	1,519	1,151
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	222,162	148,139	222,162	148,139
General reserves to total loans collectively evaluated for impairment (as a percent)			0.68%	0.78%
Total gross loans	222,162	148,139	222,162	148,139	150,934
Total allowance to gross loans (as a percent)			0.68%	0.78%
SBA
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			79	80
Charge-offs			(16)	(132)
Recoveries			51	162
Provisions for (reduction in) loan losses			(64)	(44)
Balance, at the end of the period	50	66	50	66
Other disclosures
Amount of allowance attributed to: General portfolio allocation	50	66	50	66
Loans individually evaluated for impairment	14	309	14	309
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	6,441	4,427	6,441	4,427
General reserves to total loans collectively evaluated for impairment (as a percent)			0.78%	1.49%
Total gross loans	6,455	4,736	6,455	4,736	6,882
Total allowance to gross loans (as a percent)			0.77%	1.39%
Warehouse
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			1,544	1,347
Provisions for (reduction in) loan losses			(1,319)	(301)
Balance, at the end of the period	225	1,046	225	1,046
Other disclosures
Amount of allowance attributed to: General portfolio allocation	225	1,046	225	1,046
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	49,104	112,053	49,104	112,053
General reserves to total loans collectively evaluated for impairment (as a percent)			0.46%	0.93%
Total gross loans	49,104	112,053	49,104	112,053	195,761
Total allowance to gross loans (as a percent)			0.46%	0.93%
Commercial non-owner occupied
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			1,459	1,287
Charge-offs			(757)	(88)
Recoveries				2
Provisions for (reduction in) loan losses			701	835
Balance, at the end of the period	1,403	2,036	1,403	2,036
Other disclosures
Amount of allowance attributed to: General portfolio allocation	1,403	2,036	1,403	2,036
Loans individually evaluated for impairment	437	460	437	460
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	304,542	261,586	304,542	261,586
General reserves to total loans collectively evaluated for impairment (as a percent)			0.46%	0.78%
Total gross loans	304,979	262,046	304,979	262,046	253,409
Total allowance to gross loans (as a percent)			0.46%	0.78%
Multi-family
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			1,145	2,281
Charge-offs			(101)
Provisions for (reduction in) loan losses			(538)	(184)
Balance, at the end of the period	506	2,097	506	2,097
Other disclosures
Amount of allowance attributed to: General portfolio allocation	506	2,097	506	2,097
Loans individually evaluated for impairment		1,394		1,394
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	218,929	172,090	218,929	172,090
General reserves to total loans collectively evaluated for impairment (as a percent)			0.23%	1.22%
Total gross loans	218,929	173,484	218,929	173,484	156,424
Total allowance to gross loans (as a percent)			0.23%	1.21%
One-to-four family
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			862	931
Charge-offs			(273)	(305)
Recoveries			45	7
Provisions for (reduction in) loan losses			540	(215)
Balance, at the end of the period	1,174	418	1,174	418
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	104	153	104	153	395
Amount of allowance attributed to: General portfolio allocation	1,070	265	1,070	265
Loans individually evaluated for impairment	642	643	642	643
Specific reserves to total loans individually evaluated for impairment (as a percent)			16.20%	23.79%
Loans collectively evaluated for impairment	152,025	62,128	152,025	62,128
General reserves to total loans collectively evaluated for impairment (as a percent)			0.70%	0.43%
Total gross loans	152,667	62,771	152,667	62,771	97,463
Total allowance to gross loans (as a percent)			0.77%	0.67%
Construction
Allocation of allowance as well as the activity in allowance
Provisions for (reduction in) loan losses			121
Balance, at the end of the period	121		121
Other disclosures
Amount of allowance attributed to: General portfolio allocation	121		121
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	2,835	308	2,835	308
General reserves to total loans collectively evaluated for impairment (as a percent)			4.27%	0.00%
Total gross loans	2,835	308	2,835	308
Total allowance to gross loans (as a percent)			4.27%	0.00%
Land
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			31	39
Charge-offs				(5)
Provisions for (reduction in) loan losses			116	(34)
Balance, at the end of the period	147		147
Other disclosures
Amount of allowance attributed to: General portfolio allocation	147		147
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	7,371	11,005	7,371	11,005
General reserves to total loans collectively evaluated for impairment (as a percent)			1.99%	0.00%
Total gross loans	7,371	11,005	7,371	11,005	8,774
Total allowance to gross loans (as a percent)			1.99%	0.00%
Other loans
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period			52	77
Charge-offs			(7)	(2)
Recoveries			141	25
Provisions for (reduction in) loan losses			(138)	(80)
Balance, at the end of the period	48	20	48	20
Other disclosures
Amount of allowance attributed to: General portfolio allocation	48	20	48	20
Specific reserves to total loans individually evaluated for impairment (as a percent)			0.00%	0.00%
Loans collectively evaluated for impairment	3,793	2,191	3,793	2,191
General reserves to total loans collectively evaluated for impairment (as a percent)			1.27%	0.91%
Total gross loans	$ 3,793	$ 2,191	$ 3,793	$ 2,191	$ 1,193
Total allowance to gross loans (as a percent)			1.27%	0.91%