Loans (Details 2) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Allowance for loan losses:
Individually evaluated for impairment	$ 719	$ 7,218
Collectively evaluated for impairment	25,591	26,036
Acquired with deteriorated credit quality	0	0
Total ending allowance balance	26,310	33,254
Loans:
Loans individually evaluated for impairment	50,227	46,794
Loans collectively evaluated for impairment	1,466,912	1,444,357
Loans acquired with deteriorated credit quality	373	1,207
Total ending loans balance	1,517,512	1,492,357
One To Four Family Residential Real Estate [Member]
Allowance for loan losses:
Individually evaluated for impairment	191	654
Collectively evaluated for impairment	2,805	3,441
Acquired with deteriorated credit quality	0	0
Total ending allowance balance	2,996	4,095
Loans:
Loans individually evaluated for impairment	8,715	4,537
Loans collectively evaluated for impairment	201,875	199,453
Loans acquired with deteriorated credit quality	38	70
Total ending loans balance	210,628	204,060
Construction Loans [Member]
Allowance for loan losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	63	63
Acquired with deteriorated credit quality	0	0
Total ending allowance balance	63	63
Loans:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	16,582	18,288
Loans acquired with deteriorated credit quality	0	0
Total ending loans balance	16,582	18,288
Multi Family Residential Real Estate [Member]
Allowance for loan losses:
Individually evaluated for impairment	0	195
Collectively evaluated for impairment	2,471	2,655
Acquired with deteriorated credit quality	0	0
Total ending allowance balance	2,471	2,850
Loans:
Loans individually evaluated for impairment	1,181	1,435
Loans collectively evaluated for impairment	118,918	125,080
Loans acquired with deteriorated credit quality	0	0
Total ending loans balance	120,099	126,515
Commercial Real Estate [Member]
Allowance for loan losses:
Individually evaluated for impairment	520	5,400
Collectively evaluated for impairment	13,269	12,240
Acquired with deteriorated credit quality	0
Total ending allowance balance	13,789	17,640
Loans:
Loans individually evaluated for impairment	33,868	34,009
Loans collectively evaluated for impairment	640,397	616,856
Loans acquired with deteriorated credit quality	289	825
Total ending loans balance	674,554	651,689
Commercial Loan [Member]
Allowance for loan losses:
Individually evaluated for impairment	0	969
Collectively evaluated for impairment	5,103	5,607
Acquired with deteriorated credit quality	0
Total ending allowance balance	5,103	6,576
Loans:
Loans individually evaluated for impairment	6,427	6,773
Loans collectively evaluated for impairment	360,321	343,147
Loans acquired with deteriorated credit quality	46	312
Total ending loans balance	366,794	350,232
Home Equity [Member]
Allowance for loan losses:
Individually evaluated for impairment	8	0
Collectively evaluated for impairment	1,733	1,856
Acquired with deteriorated credit quality	0	0
Total ending allowance balance	1,741	1,856
Loans:
Loans individually evaluated for impairment	36	40
Loans collectively evaluated for impairment	112,029	122,623
Loans acquired with deteriorated credit quality	0	0
Total ending loans balance	112,065	122,663
Consumer Loan [Member]
Allowance for loan losses:
Individually evaluated for impairment	0	0
Collectively evaluated for impairment	147	174
Acquired with deteriorated credit quality	0
Total ending allowance balance	147	174
Loans:
Loans individually evaluated for impairment	0	0
Loans collectively evaluated for impairment	16,790	18,910
Loans acquired with deteriorated credit quality	0	0
Total ending loans balance	$ 16,790	$ 18,910