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Loans, Trouble Debt Restructuring (Details) | 3 Months Ended | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Sep. 30, 2016 USD ($) Contract | Sep. 30, 2015 USD ($) Contract | Sep. 30, 2016 USD ($) Contract | Sep. 30, 2015 USD ($) Contract | Dec. 31, 2014 USD ($) | Dec. 31, 2015 USD ($)
Loans [Abstract] |  |  |  |  |  |
Reserves of allowance for loan losses | $ 31,000 |  | $ 31,000 |  |  | $ 37,000
Financing receivable modifications [Abstract] |  |  |  |  |  |
Number of contracts | Contract |  | 0 |  |  |  |
Number of contract, subsequently defaults | Contract | 0 | 0 | 0 | 0 |  |
Partially charged off | $ 173,000 | $ 51,000 | $ 272,000 | $ 166,000 |  |
Foreclosed assets held for sale [Abstract] |  |  |  |  |  |
Foreclosed assets held for sale | $ 1,198,000 |  | $ 1,198,000 |  |  | $ 1,354,000
Customer One [Member] |  |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |  |
Partially charged off |  |  |  |  | $ 463,000 |
Interest Modification [Member] |  |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |  |
Number of contracts | Contract | 0 |  | 0 | 1 |  |
Pre-modification Outstanding Recorded Investment | $ 0 |  | $ 0 | $ 71,000 |  |
Post-Modification Outstanding Recorded Investment | $ 0 |  | $ 0 | $ 71,000 |  |
Term Modification [Member] |  |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |  |
Number of contracts | Contract | 4 |  | 7 | 1 |  |
Pre-modification Outstanding Recorded Investment | $ 3,826,000 |  | $ 4,264,000 | $ 19,000 |  |
Post-Modification Outstanding Recorded Investment | $ 3,826,000 |  | $ 4,264,000 | $ 19,000 |  |
Real Estate Loans [Member] | Mortgages [Member] | Interest Modification [Member] |  |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |  |
Number of contracts | Contract |  |  |  | 1 |  |
Pre-modification Outstanding Recorded Investment |  |  |  | $ 71,000 |  |
Post-Modification Outstanding Recorded Investment |  |  |  | $ 71,000 |  |
Real Estate Loans [Member] | Mortgages [Member] | Term Modification [Member] |  |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |  |
Number of contracts | Contract |  |  |  | 1 |  |
Pre-modification Outstanding Recorded Investment |  |  |  | $ 19,000 |  |
Post-Modification Outstanding Recorded Investment |  |  |  | $ 19,000 |  |
Real Estate Loans [Member] | Commercial [Member] | Interest Modification [Member] |  |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |  |
Number of contracts | Contract | 0 |  | 0 |  |  |
Pre-modification Outstanding Recorded Investment | $ 0 |  | $ 0 |  |  |
Post-Modification Outstanding Recorded Investment | $ 0 |  | $ 0 |  |  |
Real Estate Loans [Member] | Commercial [Member] | Term Modification [Member] |  |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |  |
Number of contracts | Contract | 1 |  | 4 |  |  |
Pre-modification Outstanding Recorded Investment | $ 750,000 |  | $ 1,188,000 |  |  |
Post-Modification Outstanding Recorded Investment | $ 750,000 |  | $ 1,188,000 |  |  |
Other Commercial Loans [Member] | Interest Modification [Member] |  |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |  |
Number of contracts | Contract | 0 |  | 0 |  |  |
Pre-modification Outstanding Recorded Investment | $ 0 |  | $ 0 |  |  |
Post-Modification Outstanding Recorded Investment | $ 0 |  | $ 0 |  |  |
Other Commercial Loans [Member] | Term Modification [Member] |  |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |  |
Number of contracts | Contract | 3 |  | 3 |  |  |
Pre-modification Outstanding Recorded Investment | $ 3,076,000 |  | $ 3,076,000 |  |  |
Post-Modification Outstanding Recorded Investment | 3,076,000 |  | 3,076,000 |  |  |
Consumer Residential Mortgages [Member] |  |  |  |  |  |
Foreclosed assets held for sale [Abstract] |  |  |  |  |  |
Foreclosed assets held for sale | 325,000 |  | 325,000 |  |  |
Formal foreclosure proceedings on potential foreclosure assets | $ 1,265,000 |  | $ 1,265,000 |  |  |

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