Loans and the Allowance for Loan Losses (Details 5) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Specific Allowance	$ 2,168		$ 2,168		$ 2,314
Recorded Balance	10,888		10,888		10,791
Unpaid Principal Balance	10,888		10,888		10,791
Average Investment in Impaired Loans	11,461	9,881	10,841	9,431
Interest Income Recognized	85	105	196	174
One-to-four family residential
Loans without a specific valuation allowance, Average Investment in Impaired Loans	3,148	2,603
Loans without a specific valuation allowance, Interest Income Recognized	30	32
Loans with a specific valuation allowance, Average Investment in Impaired Loans	1,224	567
Loans with a specific valuation allowance, Interest Income Recognized	8	8
Average Investment in Impaired Loans	4,372	3,170
Interest Income Recognized	38	40
All other mortgage loans
Loans without a specific valuation allowance, Average Investment in Impaired Loans	2,067	1,493
Loans without a specific valuation allowance, Interest Income Recognized	28
Loans with a specific valuation allowance, Average Investment in Impaired Loans	4,973	5,055
Loans with a specific valuation allowance, Interest Income Recognized	19	65
Average Investment in Impaired Loans	7,040	6,548
Interest Income Recognized	47	65
Commercial business loans
Loans without a specific valuation allowance, Average Investment in Impaired Loans
Loans without a specific valuation allowance, Interest Income Recognized
Loans with a specific valuation allowance, Average Investment in Impaired Loans	49	163
Loans with a specific valuation allowance, Interest Income Recognized
Average Investment in Impaired Loans	49	163
Interest Income Recognized
One To Four Family Residential
Loans without a specific valuation allowance, Recorded Balance	2,998		2,998		3,238
Loans without a specific valuation allowance, Unpaid Principal Balance	2,998		2,998		1,771
Loans without a specific valuation allowance, Average Investment in Impaired Loans			3,118	3,003
Loans without a specific valuation allowance, Interest Income Recognized			69	55
Loans with a specific valuation allowance, Recorded Balance	1,149		1,149		506
Loans with a specific valuation allowance, Unpaid Principal Balance	1,149		1,149		506
Specific Allowance	291		291		320
Loans with a specific valuation allowance, Average Investment in Impaired Loans			828	198
Loans with a specific valuation allowance, Interest Income Recognized			33	10
Recorded Balance	4,147		4,147		3,744
Unpaid Principal Balance	4,147		4,147		3,744
Average Investment in Impaired Loans			3,946	3,201
Interest Income Recognized			102	65
MortgageLoansMember
Loans without a specific valuation allowance, Recorded Balance	2,060		2,060		3,238
Loans without a specific valuation allowance, Unpaid Principal Balance	2,060		2,060		1,771
Loans without a specific valuation allowance, Average Investment in Impaired Loans			1,916	1,985
Loans without a specific valuation allowance, Interest Income Recognized			55	10
Loans with a specific valuation allowance, Recorded Balance	4,634		4,634		5,184
Loans with a specific valuation allowance, Unpaid Principal Balance	4,634		4,634		5,184
Specific Allowance	1,834		1,834		1,941
Loans with a specific valuation allowance, Average Investment in Impaired Loans			4,909	4,070
Loans with a specific valuation allowance, Interest Income Recognized			39	97
Recorded Balance	6,694		6,694		6,955
Unpaid Principal Balance	6,694		6,694		6,955
Average Investment in Impaired Loans			6,825	6,055
Interest Income Recognized			94	107
Commercial Real Estate [Member]
Loans without a specific valuation allowance, Recorded Balance
Loans without a specific valuation allowance, Unpaid Principal Balance
Loans without a specific valuation allowance, Average Investment in Impaired Loans				26
Loans without a specific valuation allowance, Interest Income Recognized
Loans with a specific valuation allowance, Recorded Balance	47		47		92
Loans with a specific valuation allowance, Unpaid Principal Balance	47		47		92
Specific Allowance	43		43		53
Loans with a specific valuation allowance, Average Investment in Impaired Loans			70	149
Loans with a specific valuation allowance, Interest Income Recognized				2
Recorded Balance	47		47		92
Unpaid Principal Balance	47		47		92
Average Investment in Impaired Loans			70	175
Interest Income Recognized				$ 2