Loans (Details 3) (USD $) In Thousands, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Allowance for loan loss account by loan
Beginning balance	$ 10,648	$ 11,262	$ 11,262
Charge off	(523)	(1,717)	(3,684)
Recovery	78	195	795
Specific Provision	145		2,777
General Provision	231		(502)
Ending balance	10,579	10,609	10,648
One-to-four family mortgages [Member]
Allowance for loan loss account by loan
Beginning balance	2,490	2,640	2,640
Charge off	(206)	(122)	(379)
Recovery	3	39	81
Specific Provision	324		324
General Provision	537		(176)
Ending balance	3,148		2,490
Home equity line of credit [Member]
Allowance for loan loss account by loan
Beginning balance	374	408	408
Charge off		(53)	(67)
Recovery	1	1	6
Specific Provision	6		6
General Provision	97		21
Ending balance	478		374
Junior liens [Member]
Allowance for loan loss account by loan
Beginning balance	230	277	277
Charge off	(38)		(1)
Recovery	23	1	4
Specific Provision	(50)
General Provision	(47)		(50)
Ending balance	118		230
Multi-family [Member]
Allowance for loan loss account by loan
Beginning balance	524	1,201	1,201
Charge off			(417)
Recovery
Specific Provision			429
General Provision	(24)		(689)
Ending balance	500		524
Construction [Member]
Allowance for loan loss account by loan
Beginning balance	256	139	139
Charge off
Recovery
Specific Provision	(65)		117
General Provision	(60)
Ending balance	131		256
Land [Member]
Allowance for loan loss account by loan
Beginning balance	2,184	1,332	1,332
Charge off		(579)	(1,033)
Recovery	2	100	405
Specific Provision	(435)		635
General Provision	(297)		845
Ending balance	1,454		2,184
Non-residential real estate [Member]
Allowance for loan loss account by loan
Beginning balance	3,633	3,671	3,671
Charge off	(123)	(779)	(1,120)
Recovery	14		137
Specific Provision	(110)		1,033
General Provision	(465)		(88)
Ending balance	2,949		3,633
Consumer loans [Member]
Allowance for loan loss account by loan
Beginning balance	338	262	262
Charge off	(130)	(108)	(510)
Recovery	33	52	150
Specific Provision	204		404
General Provision	46		32
Ending balance	491		338
Commercial loans [Member]
Allowance for loan loss account by loan
Beginning balance	619	1,332	1,332
Charge off	(26)	(76)	(157)
Recovery	2	2	12
Specific Provision	271		(171)
General Provision	444		(397)
Ending balance	$ 1,310		$ 619