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Credit Quality and Nonperforming Assets (Troubled Debt Restructurings including any Subsequent Defaults) (Details)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Jun. 30, 2016
USD ($)
Jun. 30, 2015
USD ($)
Financing Receivable, Modifications [Line Items]        
Pre-Modification Outstanding Recorded Investment $ 1,999 $ 1,105 $ 2,581 $ 1,464
Post-Modification Outstanding Recorded Investment 1,999 1,105 2,581 1,464
Reserve Difference [1] 76 148 75 133
Reserve 169 $ 176 188 $ 251
One to Four Family [Member]        
Financing Receivable, Modifications [Line Items]        
Post-Modification Outstanding Recorded Investment $ 806   $ 806  
Commercial And Industrial Loans [Member]        
Financing Receivable, Modifications [Line Items]        
Number of Loans 0 1 0 3
Pre-Modification Outstanding Recorded Investment $ 0 $ 25 $ 0 $ 68
Post-Modification Outstanding Recorded Investment 0 25 0 68
Reserve Difference [1] 0 0 0 (19)
Reserve $ 0 $ 11 $ 0 $ 23
Consumer loans [Member]        
Financing Receivable, Modifications [Line Items]        
Number of Loans 1 0 3 0
Pre-Modification Outstanding Recorded Investment $ 10 $ 0 $ 80 $ 0
Post-Modification Outstanding Recorded Investment 10 0 80 0
Reserve Difference [1] 0 0 0 0
Reserve 1 0 6 0
Real Estate Loans [Member]        
Financing Receivable, Modifications [Line Items]        
Pre-Modification Outstanding Recorded Investment 1,989 1,080 2,501 1,396
Post-Modification Outstanding Recorded Investment 1,989 1,080 2,501 1,396
Reserve Difference [1] 76 148 75 152
Reserve $ 168 $ 165 $ 182 $ 228
Real Estate Loans [Member] | One to Four Family [Member]        
Financing Receivable, Modifications [Line Items]        
Number of Loans 5 2 5 2
Pre-Modification Outstanding Recorded Investment $ 806 $ 226 $ 806 $ 226
Post-Modification Outstanding Recorded Investment 806 226 806 226
Reserve Difference [1] 75 6 75 6
Reserve $ 139 $ 7 $ 139 $ 7
Real Estate Loans [Member] | Equity Line Of Credit [Member]        
Financing Receivable, Modifications [Line Items]        
Number of Loans 8 5 10 7
Pre-Modification Outstanding Recorded Investment $ 1,051 $ 436 $ 1,280 $ 641
Post-Modification Outstanding Recorded Investment 1,051 436 1,280 641
Reserve Difference [1] 1 142 0 142
Reserve $ 22 $ 157 $ 30 $ 218
Real Estate Loans [Member] | Commercial Real Estate Owner Occupied [Member]        
Financing Receivable, Modifications [Line Items]        
Number of Loans 0 0 1 0
Pre-Modification Outstanding Recorded Investment $ 0 $ 0 $ 266 $ 0
Post-Modification Outstanding Recorded Investment 0 0 266 0
Reserve Difference [1] 0 0 0 0
Reserve $ 0 $ 0 $ 4 $ 0
Real Estate Loans [Member] | Multifamily [Member]        
Financing Receivable, Modifications [Line Items]        
Number of Loans 1 1 1 1
Pre-Modification Outstanding Recorded Investment $ 132 $ 418 $ 132 $ 418
Post-Modification Outstanding Recorded Investment 132 418 132 418
Reserve Difference [1] 0 0 0 0
Reserve $ 7 $ 1 $ 7 $ 1
Other construction/Land [Member] | Real Estate Loans [Member]        
Financing Receivable, Modifications [Line Items]        
Number of Loans 0 0 1 2
Pre-Modification Outstanding Recorded Investment $ 0 $ 0 $ 17 $ 111
Post-Modification Outstanding Recorded Investment 0 0 17 111
Reserve Difference [1] 0 0 0 4
Reserve $ 0 $ 0 $ 2 $ 2
[1] This represents the change in the ALLL reserve for these credits measured as the difference between the specific post-modification impairment reserve and the pre-modification reserve calculated under our general allowance for loan loss methodology.