Credit Quality and Allowance for Loan Losses (Details 4) (USD $) In Thousands, unless otherwise specified	6 Months Ended	12 Months Ended
Jun. 30, 2012	Dec. 31, 2011
Schedule of impaired loans
Recorded Investment	$ 11,584	$ 6,403
Unpaid Principal Balance	11,584	6,403
Related Allowance	270	478
Average Recorded Investment	6,869	3,623
Interest Income Recognized	186	304
One- to four-family first mortgage [Member]
Schedule of impaired loans
Recorded Investment	1,415	1,090
Unpaid Principal Balance	1,415	1,090
Related Allowance	46	72
Average Recorded Investment	1,351	823
Interest Income Recognized	40	66
Home equity loans and lines [Member]
Schedule of impaired loans
Recorded Investment	77	94
Unpaid Principal Balance	77	94
Related Allowance		15
Average Recorded Investment	84	68
Interest Income Recognized	2	4
Commercial real estate [Member]
Schedule of impaired loans
Recorded Investment	7,364	2,249
Unpaid Principal Balance	7,364	2,249
Related Allowance	89	129
Average Recorded Investment	2,776	1,297
Interest Income Recognized	92	74
Construction and land [Member]
Schedule of impaired loans
Recorded Investment	2,130	2,305
Unpaid Principal Balance	2,130	2,305
Related Allowance	135	196
Average Recorded Investment	2,015	1,182
Interest Income Recognized	51	128
Multi-family residential [Member]
Schedule of impaired loans
Recorded Investment	528	529
Unpaid Principal Balance	528	529
Average Recorded Investment	528	66
Interest Income Recognized		25
Commercial and industrial [Member]
Schedule of impaired loans
Recorded Investment	70	136
Unpaid Principal Balance	70	136
Related Allowance		66
Average Recorded Investment	115	185
Interest Income Recognized	1	7
Consumer [Member]
Schedule of impaired loans
Recorded Investment
Unpaid Principal Balance
Related Allowance
Average Recorded Investment		2
Interest Income Recognized
With no related allowance recorded: [Member]
Schedule of impaired loans
Recorded Investment	9,941	3,699
Unpaid Principal Balance	9,941	3,699
Related Allowance
Average Recorded Investment	4,370	2,567
Interest Income Recognized	152	160
With no related allowance recorded: [Member] \| One- to four-family first mortgage [Member]
Schedule of impaired loans
Recorded Investment	1,044	540
Unpaid Principal Balance	1,044	540
Related Allowance
Average Recorded Investment	829	745
Interest Income Recognized	28	28
With no related allowance recorded: [Member] \| Home equity loans and lines [Member]
Schedule of impaired loans
Recorded Investment	77	79
Unpaid Principal Balance	77	79
Related Allowance
Average Recorded Investment	78	58
Interest Income Recognized	2	3
With no related allowance recorded: [Member] \| Commercial real estate [Member]
Schedule of impaired loans
Recorded Investment	7,221	1,747
Unpaid Principal Balance	7,221	1,747
Related Allowance
Average Recorded Investment	2,329	996
Interest Income Recognized	92	60
With no related allowance recorded: [Member] \| Construction and land [Member]
Schedule of impaired loans
Recorded Investment	1,001	734
Unpaid Principal Balance	1,001	734
Related Allowance
Average Recorded Investment	546	672
Interest Income Recognized	29	40
With no related allowance recorded: [Member] \| Multi-family residential [Member]
Schedule of impaired loans
Recorded Investment	528	529
Unpaid Principal Balance	528	529
Related Allowance
Average Recorded Investment	528	41
Interest Income Recognized		25
With no related allowance recorded: [Member] \| Commercial and industrial [Member]
Schedule of impaired loans
Recorded Investment	70	70
Unpaid Principal Balance	70	70
Related Allowance
Average Recorded Investment	60	55
Interest Income Recognized	1	4
With no related allowance recorded: [Member] \| Consumer [Member]
Schedule of impaired loans
Recorded Investment
Unpaid Principal Balance
Related Allowance
Average Recorded Investment
Interest Income Recognized
With an allowance recorded: [Member]
Schedule of impaired loans
Recorded Investment	1,643	2,704
Unpaid Principal Balance	1,643	2,704
Related Allowance	270	478
Average Recorded Investment	2,499	1,056
Interest Income Recognized	34	144
With an allowance recorded: [Member] \| One- to four-family first mortgage [Member]
Schedule of impaired loans
Recorded Investment	371	550
Unpaid Principal Balance	371	550
Related Allowance	46	72
Average Recorded Investment	522	78
Interest Income Recognized	12	38
With an allowance recorded: [Member] \| Home equity loans and lines [Member]
Schedule of impaired loans
Recorded Investment		15
Unpaid Principal Balance		15
Related Allowance		15
Average Recorded Investment	6	10
Interest Income Recognized		1
With an allowance recorded: [Member] \| Commercial real estate [Member]
Schedule of impaired loans
Recorded Investment	143	501
Unpaid Principal Balance	143	501
Related Allowance	89	129
Average Recorded Investment	447	301
Interest Income Recognized		14
With an allowance recorded: [Member] \| Construction and land [Member]
Schedule of impaired loans
Recorded Investment	1,129	1,572
Unpaid Principal Balance	1,129	1,572
Related Allowance	135	196
Average Recorded Investment	1,469	510
Interest Income Recognized	22	88
With an allowance recorded: [Member] \| Multi-family residential [Member]
Schedule of impaired loans
Recorded Investment
Unpaid Principal Balance
Related Allowance
Average Recorded Investment		25
Interest Income Recognized
With an allowance recorded: [Member] \| Commercial and industrial [Member]
Schedule of impaired loans
Recorded Investment		66
Unpaid Principal Balance		66
Related Allowance		66
Average Recorded Investment	55	130
Interest Income Recognized		3
With an allowance recorded: [Member] \| Consumer [Member]
Schedule of impaired loans
Recorded Investment
Unpaid Principal Balance
Related Allowance
Average Recorded Investment		2
Interest Income Recognized

Credit Quality and Allowance for Loan Losses (Details 4) (USD $)
In Thousands, unless otherwise specified

6 Months Ended

12 Months Ended

Jun. 30, 2012

Dec. 31, 2011

Schedule of impaired loans

Recorded Investment

$ 11,584

$ 6,403

Unpaid Principal Balance

11,584

6,403