Credit Quality of Loans and the Allowance for Loan Losses (Schedule of Impaired Loans) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015	Dec. 31, 2015
Financing Receivable, Impaired [Line Items]
Specific Allowance	$ 495		$ 495		$ 552
Recorded Balance	2,867		2,867		3,883
Unpaid Principal Balance	2,881		2,881		4,207
Average Investment in Impaired Loans	2,929	$ 4,031	3,168	$ 3,927
Interest Income Recognized	28	43	83	128
One-to-four family residential [Member]
Financing Receivable, Impaired [Line Items]
Loans without a specific valuation allowance, Recorded Balance	1,154		1,154		1,224
Loans without a specific valuation allowance, Unpaid Principal Balance	1,168		1,168		1,238
Loans without a specific valuation allowance, Average Investment in Impaired Loans	1,024	1,317	1,044	1,464
Loans without a specific valuation allowance, Interest Income Recognized	10	10	30	31
Loans with a specific valuation allowance, Recorded Balance	536		536		1,565
Loans with a specific valuation allowance, Unpaid Principal Balance	536		536		1,875
Specific Allowance	397		397		506
Loans with a specific valuation allowance, Average Investment in Impaired Loans	652	1,468	911	1,498
Loans with a specific valuation allowance, Interest Income Recognized		15		42
Recorded Balance	1,690		1,690		2,789
Unpaid Principal Balance	1,704		1,704		3,113
Average Investment in Impaired Loans	1,676	2,785	1,956	2,962
Interest Income Recognized	10	25	30	73
All other mortgage loans [Member]
Financing Receivable, Impaired [Line Items]
Loans without a specific valuation allowance, Recorded Balance	1,060		1,060
Loans without a specific valuation allowance, Unpaid Principal Balance	1,060		1,060
Loans without a specific valuation allowance, Average Investment in Impaired Loans	1,045	533	782	532
Loans without a specific valuation allowance, Interest Income Recognized	17		52
Loans with a specific valuation allowance, Recorded Balance	73		73		1,061
Loans with a specific valuation allowance, Unpaid Principal Balance	73		73		1,061
Specific Allowance	54		54		13
Loans with a specific valuation allowance, Average Investment in Impaired Loans	159	610	390	314
Loans with a specific valuation allowance, Interest Income Recognized	1	18		54
Recorded Balance	1,133		1,133		1,061
Unpaid Principal Balance	1,133		1,133		1,061
Average Investment in Impaired Loans	1,204	1,143	1,173	846
Interest Income Recognized	18	18	52	54
Commercial business loans [Member]
Financing Receivable, Impaired [Line Items]
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		18		9
Loans without a specific valuation allowance, Interest Income Recognized
Loans with a specific valuation allowance, Recorded Balance	44		44		33
Loans with a specific valuation allowance, Unpaid Principal Balance	44		44		33
Specific Allowance	44		44		33
Loans with a specific valuation allowance, Average Investment in Impaired Loans	49	85	40	110
Loans with a specific valuation allowance, Interest Income Recognized			1	1
Recorded Balance	44		44		33
Unpaid Principal Balance	44		44		$ 33
Average Investment in Impaired Loans	49	103	40	119
Interest Income Recognized			$ 1	$ 1