Loans, Allowance for loan losses (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012
Allowance for loan losses, allowance and recorded investment [Abstract]
Allowance for loan losses, ending balance: individually evaluated for impairment	$ 1,006		$ 1,018
Allowance for loan losses, ending balance: collectively evaluated for impairment	3,040		3,230
Allowance for loan losses, ending balance	4,046		4,248
Loans receivables, ending balance: individually evaluated for impairment	10,869		11,993
Loans receivable, ending balance: collectively evaluated for impairment	330,080		317,308
Loans receivable, ending balance	340,949		329,301
Allowance for loan losses [Roll Forward]
Beginning Allowance	4,248	4,455
Charge-offs	(494)	(1,613)
Recoveries	42	10
Provision	250	1,500
Ending Allowance	4,046	4,350
One-to four- family [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Allowance for loan losses, ending balance: individually evaluated for impairment	336		392
Allowance for loan losses, ending balance: collectively evaluated for impairment	963		1,025
Allowance for loan losses, ending balance	1,299		1,417
Loans receivables, ending balance: individually evaluated for impairment	6,305		6,016
Loans receivable, ending balance: collectively evaluated for impairment	92,688		89,768
Loans receivable, ending balance	98,993		95,784
Allowance for loan losses [Roll Forward]
Beginning Allowance	1,417	1,117
Charge-offs	(69)	(750)
Recoveries	0	0
Provision	(49)	1,215
Ending Allowance	1,299	1,582
Home equity [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Allowance for loan losses, ending balance: individually evaluated for impairment	334		247
Allowance for loan losses, ending balance: collectively evaluated for impairment	669		750
Allowance for loan losses, ending balance	1,003		997
Loans receivables, ending balance: individually evaluated for impairment	1,748		1,731
Loans receivable, ending balance: collectively evaluated for impairment	33,591		33,633
Loans receivable, ending balance	35,339		35,364
Allowance for loan losses [Roll Forward]
Beginning Allowance	997	1,426
Charge-offs	(147)	(714)
Recoveries	2	2
Provision	151	697
Ending Allowance	1,003	1,410
Commercial and multifamily [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Allowance for loan losses, ending balance: individually evaluated for impairment	69		70
Allowance for loan losses, ending balance: collectively evaluated for impairment	458		422
Allowance for loan losses, ending balance	527		492
Loans receivables, ending balance: individually evaluated for impairment	1,015		2,127
Loans receivable, ending balance: collectively evaluated for impairment	132,163		131,493
Loans receivable, ending balance	133,178		133,620
Allowance for loan losses [Roll Forward]
Beginning Allowance	492	969
Charge-offs	(192)	0
Recoveries	32	0
Provision	195	(461)
Ending Allowance	527	508
Construction and land [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Allowance for loan losses, ending balance: individually evaluated for impairment	25		25
Allowance for loan losses, ending balance: collectively evaluated for impairment	262		192
Allowance for loan losses, ending balance	287		217
Loans receivables, ending balance: individually evaluated for impairment	99		571
Loans receivable, ending balance: collectively evaluated for impairment	34,414		24,887
Loans receivable, ending balance	34,513		25,458
Allowance for loan losses [Roll Forward]
Beginning Allowance	217	105
Charge-offs	(7)	(37)
Recoveries	0	0
Provision	77	(2)
Ending Allowance	287	66
Manufactured homes [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Allowance for loan losses, ending balance: individually evaluated for impairment	107		117
Allowance for loan losses, ending balance: collectively evaluated for impairment	110		143
Allowance for loan losses, ending balance	217		260
Loans receivables, ending balance: individually evaluated for impairment	623		654
Loans receivable, ending balance: collectively evaluated for impairment	14,953		15,578
Loans receivable, ending balance	15,576		16,232
Allowance for loan losses [Roll Forward]
Beginning Allowance	260	290
Charge-offs	(24)	(28)
Recoveries	0	1
Provision	(19)	114
Ending Allowance	217	377
Other consumer [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Allowance for loan losses, ending balance: individually evaluated for impairment	27		22
Allowance for loan losses, ending balance: collectively evaluated for impairment	151		124
Allowance for loan losses, ending balance	178		146
Loans receivables, ending balance: individually evaluated for impairment	52		55
Loans receivable, ending balance: collectively evaluated for impairment	8,727		8,595
Loans receivable, ending balance	8,779		8,650
Allowance for loan losses [Roll Forward]
Beginning Allowance	146	213
Charge-offs	(11)	(78)
Recoveries	8	7
Provision	35	2
Ending Allowance	178	142
Commercial business [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Allowance for loan losses, ending balance: individually evaluated for impairment	108		145
Allowance for loan losses, ending balance: collectively evaluated for impairment	92		73
Allowance for loan losses, ending balance	200		218
Loans receivables, ending balance: individually evaluated for impairment	1,027		839
Loans receivable, ending balance: collectively evaluated for impairment	13,544		13,354
Loans receivable, ending balance	14,571		14,193
Allowance for loan losses [Roll Forward]
Beginning Allowance	218	254
Charge-offs	(44)	(6)
Recoveries	0	0
Provision	26	(14)
Ending Allowance	200	234
Unallocated [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Allowance for loan losses, ending balance: individually evaluated for impairment	0		0
Allowance for loan losses, ending balance: collectively evaluated for impairment	335		501
Allowance for loan losses, ending balance	335		501
Loans receivables, ending balance: individually evaluated for impairment	0		0
Loans receivable, ending balance: collectively evaluated for impairment	0		0
Loans receivable, ending balance	0		0
Allowance for loan losses [Roll Forward]
Beginning Allowance	501	81
Charge-offs	0	0
Recoveries	0	0
Provision	(166)	(50)
Ending Allowance	335	31
Real Estate Loans [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Loans receivable, ending balance	302,023		290,226
Real Estate Loans [Member] | One-to four- family [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Loans receivable, ending balance	98,993		95,784
Real Estate Loans [Member] | Home equity [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Loans receivable, ending balance	35,339		35,364
Real Estate Loans [Member] | Commercial and multifamily [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Loans receivable, ending balance	133,178		133,620
Real Estate Loans [Member] | Construction and land [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Loans receivable, ending balance	34,513		25,458
Consumer Loans [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Loans receivable, ending balance	24,355		24,882
Consumer Loans [Member] | Manufactured homes [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Loans receivable, ending balance	15,576		16,232
Consumer Loans [Member] | Other consumer [Member]
Allowance for loan losses, allowance and recorded investment [Abstract]
Loans receivable, ending balance	$ 8,779		$ 8,650