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Loans, Trouble Debt Restructuring (Details) $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2018 USD ($) Contract | Jun. 30, 2017 USD ($) Contract | Jun. 30, 2018 USD ($) Contract | Jun. 30, 2017 USD ($) Contract | Dec. 31, 2017 USD ($)
Loans [Abstract] |  |  |  |  |
Reserves of allowance for loan losses | $ 87 |  | $ 87 |  | $ 41
Financing receivable modifications [Abstract] |  |  |  |  |
Number of contract, subsequently defaults | Contract | 0 | 0 | 0 | 0 |
Interest Modification [Member] |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |
Number of contracts | Contract | 0 | 0 | 0 | 0 |
Pre-modification outstanding recorded investment | $ 0 | $ 0 | $ 0 | $ 0 |
Post-modification outstanding recorded investment | $ 0 | $ 0 | $ 0 | $ 0 |
Term Modification [Member] |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |
Number of contracts | Contract | 7 | 5 | 8 | 7 |
Pre-modification outstanding recorded investment | $ 2,277 | $ 6,093 | $ 2,284 | $ 6,797 |
Post-modification outstanding recorded investment | $ 2,277 | $ 6,093 | $ 2,284 | $ 6,797 |
Real Estate Loans [Member] | Home Equity [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] | Home Equity [Member] | Term Modification [Member] |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |
Number of contracts | Contract | 1 |  | 1 |  |
Pre-modification outstanding recorded investment | $ 1 |  | $ 1 |  |
Post-modification outstanding recorded investment | $ 1 |  | $ 1 |  |
Real Estate Loans [Member] | Mortgages [Member] | Interest Modification [Member] |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |
Number of contracts | Contract |  |  | 0 |  |
Pre-modification outstanding recorded investment |  |  | $ 0 |  |
Post-modification outstanding recorded investment |  |  | $ 0 |  |
Real Estate Loans [Member] | Mortgages [Member] | Term Modification [Member] |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |
Number of contracts | Contract |  |  | 1 |  |
Pre-modification outstanding recorded investment |  |  | $ 7 |  |
Post-modification outstanding recorded investment |  |  | $ 7 |  |
Real Estate Loans [Member] | Commercial [Member] | Interest Modification [Member] |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |
Number of contracts | Contract | 0 | 0 | 0 | 0 |
Pre-modification outstanding recorded investment | $ 0 | $ 0 | $ 0 | $ 0 |
Post-modification outstanding recorded investment | $ 0 | $ 0 | $ 0 | $ 0 |
Real Estate Loans [Member] | Commercial [Member] | Term Modification [Member] |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |
Number of contracts | Contract | 1 | 5 | 1 | 7 |
Pre-modification outstanding recorded investment | $ 577 | $ 6,093 | $ 577 | $ 6,797 |
Post-modification outstanding recorded investment | $ 577 | $ 6,093 | $ 577 | $ 6,797 |
Real Estate Loans [Member] | Agricultural [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] | Agricultural [Member] | Term Modification [Member] |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |
Number of contracts | Contract | 1 |  | 1 |  |
Pre-modification outstanding recorded investment | $ 1,523 |  | $ 1,523 |  |
Post-modification outstanding recorded investment | $ 1,523 |  | $ 1,523 |  |
Other Agricultural 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 Agricultural Loans [Member] | Term Modification [Member] |  |  |  |  |
Financing receivable modifications [Abstract] |  |  |  |  |
Number of contracts | Contract | 4 |  | 4 |  |
Pre-modification outstanding recorded investment | $ 176 |  | $ 176 |  |
Post-modification outstanding recorded investment | $ 176 |  | $ 176 |  |

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