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Loans Receivable (Details 3) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Residential real estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | $ 1,152 | $ 2,375
Unpaid Principal Balance | 3,621 | 4,359
Related Allowance | 21 | 879
Average Recorded Investment | 1,357 | 2,930
Interest Income Recognized | 71 | 126
Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 512 | 323
Unpaid Principal Balance | 512 | 323
Related Allowance | 144 | 3
Average Recorded Investment | 502 | 1,227
Interest Income Recognized | 6 | 6
Construction and land develolpment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 134 | 134
Unpaid Principal Balance | 134 | 134
Related Allowance | 0 | 0
Average Recorded Investment | 134 | 134
Interest Income Recognized | 0 | 0
Commercial business [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 724 | 687
Unpaid Principal Balance | 724 | 687
Related Allowance | 539 | 354
Average Recorded Investment | 690 | 492
Interest Income Recognized | 10 | 5
Impaired Loans With No Related Allowance [Member] | Residential real estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 1,072 | 1,309
Unpaid Principal Balance | 3,351 | 3,293
Related Allowance | 0 | 0
Average Recorded Investment | 1,101 | 2,582
Interest Income Recognized | 70 | 120
Impaired Loans With No Related Allowance [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 253 | 305
Unpaid Principal Balance | 253 | 305
Related Allowance | 0 | 0
Average Recorded Investment | 339 | 1,138
Interest Income Recognized | 6 | 6
Impaired Loans With No Related Allowance [Member] | Construction and land develolpment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 134 | 134
Unpaid Principal Balance | 134 | 134
Related Allowance | 0 | 0
Average Recorded Investment | 134 | 134
Interest Income Recognized | 0 | 0
Impaired Loans With No Related Allowance [Member] | Commercial business [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 184 | 212
Unpaid Principal Balance | 184 | 212
Related Allowance | 0 | 0
Average Recorded Investment | 198 | 168
Interest Income Recognized | 10 | 4
Impaired Loans With Related Allowance [Member] | Residential real estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 80 | 1,066
Unpaid Principal Balance | 270 | 1,066
Related Allowance | 21 | 879
Average Recorded Investment | 256 | 348
Interest Income Recognized | 1 | 6
Impaired Loans With Related Allowance [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 259 | 18
Unpaid Principal Balance | 259 | 18
Related Allowance | 144 | 3
Average Recorded Investment | 163 | 89
Interest Income Recognized | 0 | 0
Impaired Loans With Related Allowance [Member] | Construction and land develolpment [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 0 | 0
Unpaid Principal Balance | 0 | 0
Related Allowance | 0 | 0
Average Recorded Investment | 0 | 0
Interest Income Recognized | 0 | 0
Impaired Loans With Related Allowance [Member] | Commercial business [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Recorded Investment | 540 | 475
Unpaid Principal Balance | 540 | 475
Related Allowance | 539 | 354
Average Recorded Investment | 492 | 324
Interest Income Recognized | $ 0 | $ 1

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