Real Estate and Other Assets Owned (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011
Presentation of balances in other real estate and assets owned consisting other non-performing loan
Total other assets owned	$ 1,480	$ 1,548	$ 1,181	$ 2,267
Total non-accrual loans	7,036	7,663	11,216
Total non-performing assets	8,516	9,211	12,397
Non-performing assets / Total assets	0.86%	0.95%	1.18%
One-to-four family mortgages [Member]
Presentation of balances in other real estate and assets owned consisting other non-performing loan
Total other assets owned	295	258	540	480
Total non-accrual loans	1,883	2,243	2,294
Multi-family [Member]
Presentation of balances in other real estate and assets owned consisting other non-performing loan
Total other assets owned				905
Total non-accrual loans		38
Construction [Member]
Presentation of balances in other real estate and assets owned consisting other non-performing loan
Total other assets owned		130	216	465
Total non-accrual loans	177
Land [Member]
Presentation of balances in other real estate and assets owned consisting other non-performing loan
Total other assets owned	1,112	1,112	425	248
Total non-accrual loans	1,496	2,768	5,042
Non-residential real estate [Member]
Presentation of balances in other real estate and assets owned consisting other non-performing loan
Total other assets owned	73	44		160
Total non-accrual loans	2,754	1,782	3,630
Consumer assets owned by bank [Member]
Presentation of balances in other real estate and assets owned consisting other non-performing loan
Total other assets owned		$ 4		$ 9