Credit Quality of Loans and the Allowance for Loan Losses (Schedule of Impaired Loans) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Financing Receivable, Impaired [Line Items]
Specific Allowance	$ 245		$ 909
Recorded Balance	4,200		3,442
Unpaid Principal Balance	4,695		3,442
Average Investment in Impaired Loans	3,822	10,021
Interest Income Recognized	43	109
One-to-four family residential loans [Member]
Financing Receivable, Impaired [Line Items]
Loans without a specific valuation allowance, Recorded Balance	2,112		1,108
Loans without a specific valuation allowance, Unpaid Principal Balance	2,607		1,108
Loans without a specific valuation allowance, Average Investment in Impaired Loans	1,610	5,583
Loans without a specific valuation allowance, Interest Income Recognized	12	64
Loans with a specific valuation allowance, Recorded Balance	885		2,171
Loans with a specific valuation allowance, Unpaid Principal Balance	885		2,171
Specific Allowance	102		653
Loans with a specific valuation allowance, Average Investment in Impaired Loans	1,528	782
Loans with a specific valuation allowance, Interest Income Recognized	12	9
Recorded Balance	2,997		3,279
Unpaid Principal Balance	3,492		3,279
Average Investment in Impaired Loans	3,138	6,365
Interest Income Recognized	24	73
All other mortgage loans [Member]
Financing Receivable, Impaired [Line Items]
Loans without a specific valuation allowance, Recorded Balance	1,060
Loans without a specific valuation allowance, Unpaid Principal Balance	1,060
Loans without a specific valuation allowance, Average Investment in Impaired Loans	530	2,039
Loans without a specific valuation allowance, Interest Income Recognized	18	20
Loans with a specific valuation allowance, Recorded Balance	17		18
Loans with a specific valuation allowance, Unpaid Principal Balance	17		18
Specific Allowance	17		18
Loans with a specific valuation allowance, Average Investment in Impaired Loans	18	1,477
Loans with a specific valuation allowance, Interest Income Recognized		14
Recorded Balance	1,077		18
Unpaid Principal Balance	1,077		18
Average Investment in Impaired Loans	548	3,516
Interest Income Recognized	18	34
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		77
Loans without a specific valuation allowance, Interest Income Recognized		1
Loans with a specific valuation allowance, Recorded Balance	126		145
Loans with a specific valuation allowance, Unpaid Principal Balance	126		145
Specific Allowance	126		145
Loans with a specific valuation allowance, Average Investment in Impaired Loans	136	63
Loans with a specific valuation allowance, Interest Income Recognized	1	1
Recorded Balance	126		145
Unpaid Principal Balance	126		145
Average Investment in Impaired Loans	136	140
Interest Income Recognized	$ 1	$ 2