Credit Quality of Loans and the Allowance for Loan Losses (Schedule of Aging Analysis of Loans Receivable) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	$ 1,410	$ 1,929
Current	355,030	338,860
Total Loans receivable	356,440	340,789
One-to-four family residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	577	1,820
Current	191,516	191,604
Total Loans receivable	192,093	193,424
All other mortgage loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	246	63
Current	135,967	121,894
Total Loans receivable	136,213	121,957
Commercial business loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	581	38
Current	25,405	23,177
Total Loans receivable	25,986	23,215
Consumer loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	6	8
Current	2,142	2,185
Total Loans receivable	2,148	2,193
30-59 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	258	465
30-59 Days Past Due [Member] | One-to-four family residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	56	442
30-59 Days Past Due [Member] | All other mortgage loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	183
30-59 Days Past Due [Member] | Commercial business loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	14	15
30-59 Days Past Due [Member] | Consumer loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	5	8
60-89 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	334	419
60-89 Days Past Due [Member] | One-to-four family residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	284	419
60-89 Days Past Due [Member] | All other mortgage loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due
60-89 Days Past Due [Member] | Commercial business loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	50
60-89 Days Past Due [Member] | Consumer loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due
Greater Than 90 Days Past Due [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	818	1,045
Greater Than 90 Days Past Due [Member] | One-to-four family residential [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	237	959
Greater Than 90 Days Past Due [Member] | All other mortgage loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	63	63
Greater Than 90 Days Past Due [Member] | Commercial business loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	517	23
Greater Than 90 Days Past Due [Member] | Consumer loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Total Past Due	$ 1