Allowance for Loan Losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 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	(480)	(423)
Recoveries	184	17
Provisions for (reduction in) loan losses	296
Balance, at the end of the period	7,994	8,116
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	616		665
Amount of allowance attributed to: General portfolio allocation	7,378	8,116
Loans individually evaluated for impairment	3,752	4,628
Specific reserves to total loans individually evaluated for impairment (as a percent)	16.42%	0.00%
Loans collectively evaluated for impairment	942,239	691,121
General reserves to total loans collectively evaluated for impairment (as a percent)	0.78%	1.17%
Total gross loans	945,991	695,749	986,194
Total allowance to gross loans (as a percent)	0.85%	1.17%
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	(58)	(191)
Recoveries	7	1
Provisions for (reduction in) loan losses	1,037	291
Balance, at the end of the period	2,296	1,462
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	256		270
Amount of allowance attributed to: General portfolio allocation	2,040	1,462
Loans individually evaluated for impairment	580	76
Specific reserves to total loans individually evaluated for impairment (as a percent)	44.14%	0.00%
Loans collectively evaluated for impairment	140,012	83,871
General reserves to total loans collectively evaluated for impairment (as a percent)	1.46%	1.74%
Total gross loans	140,592	83,947	115,354
Total allowance to gross loans (as a percent)	1.63%	1.74%
Commercial owner occupied
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	1,512	1,119
Provisions for (reduction in) loan losses	153	31
Balance, at the end of the period	1,665	1,150
Other disclosures
Amount of allowance attributed to: General portfolio allocation	1,665	1,150
Loans individually evaluated for impairment	245	913
Specific reserves to total loans individually evaluated for impairment (as a percent)	0.00%	0.00%
Loans collectively evaluated for impairment	166,326	145,991
General reserves to total loans collectively evaluated for impairment (as a percent)	1.00%	0.79%
Total gross loans	166,571	146,904	150,934
Total allowance to gross loans (as a percent)	1.00%	0.78%
SBA
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	79	80
Charge-offs	(5)	(108)
Recoveries	19	11
Provisions for (reduction in) loan losses	(43)	188
Balance, at the end of the period	50	171
Other disclosures
Amount of allowance attributed to: General portfolio allocation	50	171
Loans individually evaluated for impairment	129	604
Specific reserves to total loans individually evaluated for impairment (as a percent)	0.00%	0.00%
Loans collectively evaluated for impairment	4,987	3,344
General reserves to total loans collectively evaluated for impairment (as a percent)	1.00%	5.11%
Total gross loans	5,116	3,948	6,882
Total allowance to gross loans (as a percent)	0.98%	4.33%
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	(814)	(576)
Balance, at the end of the period	730	771
Other disclosures
Amount of allowance attributed to: General portfolio allocation	730	771
Specific reserves to total loans individually evaluated for impairment (as a percent)	0.00%	0.00%
Loans collectively evaluated for impairment	138,935	44,246
General reserves to total loans collectively evaluated for impairment (as a percent)	0.53%	1.74%
Total gross loans	138,935	44,246	195,761
Total allowance to gross loans (as a percent)	0.53%	1.74%
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	(401)	(1)
Provisions for (reduction in) loan losses	345	215
Balance, at the end of the period	1,403	1,501
Other disclosures
Amount of allowance attributed to: General portfolio allocation	1,403	1,501
Loans individually evaluated for impairment	1,974	648
Specific reserves to total loans individually evaluated for impairment (as a percent)	0.00%	0.00%
Loans collectively evaluated for impairment	254,041	168,024
General reserves to total loans collectively evaluated for impairment (as a percent)	0.55%	0.89%
Total gross loans	256,015	168,672	253,409
Total allowance to gross loans (as a percent)	0.55%	0.89%
Multi-family
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	1,145	2,281
Provisions for (reduction in) loan losses	(639)	196
Balance, at the end of the period	506	2,477
Other disclosures
Amount of allowance attributed to: General portfolio allocation	506	2,477
Loans individually evaluated for impairment		1,414
Specific reserves to total loans individually evaluated for impairment (as a percent)	0.00%	0.00%
Loans collectively evaluated for impairment	139,100	183,953
General reserves to total loans collectively evaluated for impairment (as a percent)	0.36%	1.35%
Total gross loans	139,100	185,367	156,424
Total allowance to gross loans (as a percent)	0.36%	1.34%
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	(10)	(122)
Recoveries	43	1
Provisions for (reduction in) loan losses	279	(247)
Balance, at the end of the period	1,174	563
Other disclosures
Amount of allowance attributed to: Specifically evaluated impaired loans	360		395
Amount of allowance attributed to: General portfolio allocation	814	563
Loans individually evaluated for impairment	824	973
Specific reserves to total loans individually evaluated for impairment (as a percent)	43.69%	0.00%
Loans collectively evaluated for impairment	86,285	51,307
General reserves to total loans collectively evaluated for impairment (as a percent)	0.94%	1.10%
Total gross loans	87,109	52,280	97,463
Total allowance to gross loans (as a percent)	1.35%	1.08%
Land
Allocation of allowance as well as the activity in allowance
Balance, at the beginning of the period	31	39
Provisions for (reduction in) loan losses	90	(39)
Balance, at the end of the period	121
Other disclosures
Amount of allowance attributed to: General portfolio allocation	121
Specific reserves to total loans individually evaluated for impairment (as a percent)	0.00%	0.00%
Loans collectively evaluated for impairment	7,863	7,246
General reserves to total loans collectively evaluated for impairment (as a percent)	1.54%	0.00%
Total gross loans	7,863	7,246	8,774
Total allowance to gross loans (as a percent)	1.54%	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	(6)	(1)
Recoveries	115	4
Provisions for (reduction in) loan losses	(112)	(59)
Balance, at the end of the period	49	21
Other disclosures
Amount of allowance attributed to: General portfolio allocation	49	21
Specific reserves to total loans individually evaluated for impairment (as a percent)	0.00%	0.00%
Loans collectively evaluated for impairment	4,690	3,139
General reserves to total loans collectively evaluated for impairment (as a percent)	1.04%	0.67%
Total gross loans	$ 4,690	$ 3,139	$ 1,193
Total allowance to gross loans (as a percent)	1.04%	0.67%