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Loans and Allowance for Loan Losses (Details 2) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2016 | Dec. 31, 2015
Financing Receivable, Impaired [Line Items] |  |
Unpaid contractual principal | $ 8,027 | $ 8,589
Impaired loan balance | 6,077 | 6,837
Impaired loans without an allowance | 5,525 | 6,467
Impaired loans with an allowance | 552 | 370
Related allowance recorded | 37 | 88
Year-to-date average loan balance | 6,438 | 7,408
Year-to-date interest income recognized | 461 | 288
Residential Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid contractual principal | 309 | 752
Impaired loan balance | 309 | 752
Impaired loans without an allowance | 309 | 408
Impaired loans with an allowance | 0 | 344
Related allowance recorded | 0 | 78
Year-to-date average loan balance | 323 | 1,041
Year-to-date interest income recognized | 6 | 0
Construction Loans [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid contractual principal | 3,741 | 3,955
Impaired loan balance | 2,006 | 2,220
Impaired loans without an allowance | 2,006 | 2,220
Impaired loans with an allowance | 0 | 0
Related allowance recorded | 0 | 0
Year-to-date average loan balance | 2,101 | 2,389
Year-to-date interest income recognized | 56 | 88
Commercial Real Estate [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid contractual principal | 2,517 | 2,429
Impaired loan balance | 2,517 | 2,429
Impaired loans without an allowance | 2,517 | 2,429
Impaired loans with an allowance | 0 | 0
Related allowance recorded | 0 | 0
Year-to-date average loan balance | 2,618 | 2,484
Year-to-date interest income recognized | 383 | 175
Commercial Loan [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid contractual principal | 114 | 637
Impaired loan balance | 114 | 620
Impaired loans without an allowance | 62 | 620
Impaired loans with an allowance | 52 | 0
Related allowance recorded | 13 | 0
Year-to-date average loan balance | 138 | 634
Year-to-date interest income recognized | 2 | 3
Agriculture Loans [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid contractual principal | 891 | 189
Impaired loan balance | 676 | 189
Impaired loans without an allowance | 224 | 189
Impaired loans with an allowance | 452 | 0
Related allowance recorded | 2 | 0
Year-to-date average loan balance | 686 | 188
Year-to-date interest income recognized | 4 | 3
Municipal Loans [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid contractual principal | 345 | 591
Impaired loan balance | 345 | 591
Impaired loans without an allowance | 345 | 591
Impaired loans with an allowance | 0 | 0
Related allowance recorded | 0 | 0
Year-to-date average loan balance | 456 | 631
Year-to-date interest income recognized | 10 | 19
Consumer Loan [Member] |  |
Financing Receivable, Impaired [Line Items] |  |
Unpaid contractual principal | 110 | 36
Impaired loan balance | 110 | 36
Impaired loans without an allowance | 62 | 10
Impaired loans with an allowance | 48 | 26
Related allowance recorded | 22 | 10
Year-to-date average loan balance | 116 | 41
Year-to-date interest income recognized | $ 0 | $ 0

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