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Credit Quality of Loans and the Allowance for Loan Losses (Schedule of Allowance for Loan Losses and Recorded Investment) (Details) - USD ($)
$ in Thousands
Sep. 30, 2016
Jun. 30, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Dec. 31, 2014
Ending balances: Allowance for loan losses            
Individually evaluated for impairment $ 495   $ 552      
Collectively evaluated for impairment 2,412   2,285      
Total allowance for loan losses 2,907 $ 2,776 2,837 $ 2,750 $ 2,668 $ 2,769
Ending balances: Loans            
Individually evaluated for impairment 2,867   3,883      
Collectively evaluated for impairment 329,121   300,905      
Total balance 331,988   304,788      
One-to-four family residential [Member]            
Ending balances: Allowance for loan losses            
Individually evaluated for impairment 397   506      
Collectively evaluated for impairment 1,080   840      
Total allowance for loan losses 1,477 1,582 1,346 1,401 1,115 1,533
Ending balances: Loans            
Individually evaluated for impairment 1,690   2,789      
Collectively evaluated for impairment 184,325   176,943      
Total balance [1] 186,015   179,732      
All other mortgage loans [Member]            
Ending balances: Allowance for loan losses            
Individually evaluated for impairment 54   13      
Collectively evaluated for impairment 1,063   1,197      
Total allowance for loan losses 1,117 957 1,210 1,065 1,164 885
Ending balances: Loans            
Individually evaluated for impairment 1,133   1,061      
Collectively evaluated for impairment 121,563   104,060      
Total balance [1] 122,696   105,121      
Commercial business loans [Member]            
Ending balances: Allowance for loan losses            
Individually evaluated for impairment 44   33      
Collectively evaluated for impairment 266   246      
Total allowance for loan losses 310 234 279 279 346 343
Ending balances: Loans            
Individually evaluated for impairment 44   33      
Collectively evaluated for impairment 21,373   17,998      
Total balance [1] 21,417   18,031      
Consumer loans [Member]            
Ending balances: Allowance for loan losses            
Individually evaluated for impairment        
Collectively evaluated for impairment 3   2      
Total allowance for loan losses 3 $ 3 2 $ 5 $ 5 $ 8
Ending balances: Loans            
Individually evaluated for impairment        
Collectively evaluated for impairment 1,860   1,904      
Total balance [1] $ 1,860   $ 1,904      
[1] Ratings are generally assigned to consumer and residential mortgage loans on a "pass" or "fail" basis, where "fail" results in a substandard classification. Commercial loans, both secured by real estate or other assets or unsecured, are analyzed in accordance with an analytical matrix codified in the Bank's loan policy that produces a risk rating as described below.