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Loans (Details 5) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Financing Receivable Impaired [Line Items] |  |  |
Unpaid Principal Balance, With no related allowance recorded | $ 4,282 | $ 5,561 | $ 7,205
Unpaid Principal Balance, With an allowance recorded | 1,636 | 2,710 | 4,014
Unpaid Principal Balance | 5,918 | 8,271 | 11,219
Recorded Investment, With no related allowance recorded | 3,925 | 4,649 | 6,090
Recorded Investment, With an allowance recorded | 1,611 | 2,689 | 3,992
Recorded Investment | 5,536 | 7,338 | 10,082
Allowance for Loan Losses Allocated | 162 | 249 | 497
Average Recorded Investment, With no related allowance recorded | 3,757 | 5,196 | 5,400
Average Recorded Investment, With an allowance recorded | 1,892 | 3,374 | 5,074
Average Recorded Investment | 5,649 | 8,570 | 10,474
Interest Income Recognized, With no related allowance recorded | 180 | 258 | 335
Interest Income Recognized, With related allowance recorded | 70 | 140 | 196
Interest Income Recognized | 250 | 398 | 531
Consumer |  |  |
Financing Receivable Impaired [Line Items] |  |  |
Unpaid Principal Balance, With no related allowance recorded | 145 | 205 | 214
Unpaid Principal Balance, With an allowance recorded | 0 | 0 |
Recorded Investment, With no related allowance recorded | 59 | 96 | 103
Recorded Investment, With an allowance recorded | 0 | 0 |
Allowance for Loan Losses Allocated | 0 | 0 |
Average Recorded Investment, With no related allowance recorded | 74 | 97 | 81
Average Recorded Investment, With an allowance recorded | 2 | 1 |
Interest Income Recognized, With no related allowance recorded | 11 | 13 | 14
Interest Income Recognized, With related allowance recorded | 0 | 0 |
Commercial real estate, Owner occupied | Commercial real estate |  |  |
Financing Receivable Impaired [Line Items] |  |  |
Unpaid Principal Balance, With no related allowance recorded | 659 | 1,974 | 2,956
Unpaid Principal Balance, With an allowance recorded | 0 | 173 | 1,597
Recorded Investment, With no related allowance recorded | 658 | 1,456 | 2,436
Recorded Investment, With an allowance recorded | 0 | 173 | 1,595
Allowance for Loan Losses Allocated | 0 | 14 | 379
Average Recorded Investment, With no related allowance recorded | 767 | 1,601 | 2,080
Average Recorded Investment, With an allowance recorded | 134 | 874 | 2,008
Interest Income Recognized, With no related allowance recorded | 10 | 70 | 106
Interest Income Recognized, With related allowance recorded | 6 | 29 | 70
Commercial real estate, Non-owner occupied | Commercial real estate |  |  |
Financing Receivable Impaired [Line Items] |  |  |
Unpaid Principal Balance, With no related allowance recorded | 0 | 332 | 343
Unpaid Principal Balance, With an allowance recorded | 0 | 1,118 | 1,480
Recorded Investment, With no related allowance recorded | 0 | 331 | 342
Recorded Investment, With an allowance recorded | 0 | 1,118 | 1,480
Allowance for Loan Losses Allocated | 0 | 30 | 50
Average Recorded Investment, With no related allowance recorded | 68 | 334 | 372
Average Recorded Investment, With an allowance recorded | 640 | 1,283 | 1,511
Interest Income Recognized, With no related allowance recorded | 2 | 5 | 30
Interest Income Recognized, With related allowance recorded | 28 | 67 | 79
Commercial real estate, Farmland | Commercial real estate |  |  |
Financing Receivable Impaired [Line Items] |  |  |
Unpaid Principal Balance, With no related allowance recorded | 0 |  |
Unpaid Principal Balance, With an allowance recorded | 0 | 380 |
Recorded Investment, With no related allowance recorded | 0 |  |
Recorded Investment, With an allowance recorded | 0 | 379 |
Allowance for Loan Losses Allocated | 0 | 42 |
Average Recorded Investment, With no related allowance recorded | 12 |  |
Average Recorded Investment, With an allowance recorded | 63 | 127 |
Interest Income Recognized, With no related allowance recorded | 0 |  |
Interest Income Recognized, With related allowance recorded | 0 | 0 |
Commercial, Commercial and industrial | Commercial |  |  |
Financing Receivable Impaired [Line Items] |  |  |
Unpaid Principal Balance, With no related allowance recorded | 214 | 205 | 834
Unpaid Principal Balance, With an allowance recorded | 68 | 75 | 81
Recorded Investment, With no related allowance recorded | 192 | 184 | 631
Recorded Investment, With an allowance recorded | 68 | 75 | 81
Allowance for Loan Losses Allocated | 4 | 4 | 5
Average Recorded Investment, With no related allowance recorded | 184 | 641 | 433
Average Recorded Investment, With an allowance recorded | 71 | 103 | 540
Interest Income Recognized, With no related allowance recorded | 4 | 15 | 23
Interest Income Recognized, With related allowance recorded | 4 | 4 | 4
Residential real estate, 1-4 family residential | Residential real estate |  |  |
Financing Receivable Impaired [Line Items] |  |  |
Unpaid Principal Balance, With no related allowance recorded | 2,923 | 2,650 | 2,575
Unpaid Principal Balance, With an allowance recorded | 1,409 | 661 | 769
Recorded Investment, With no related allowance recorded | 2,697 | 2,403 | 2,310
Recorded Investment, With an allowance recorded | 1,387 | 642 | 749
Allowance for Loan Losses Allocated | 84 | 51 | 61
Average Recorded Investment, With no related allowance recorded | 2,343 | 2,302 | 2,174
Average Recorded Investment, With an allowance recorded | 837 | 828 | 919
Interest Income Recognized, With no related allowance recorded | 138 | 145 | 147
Interest Income Recognized, With related allowance recorded | 29 | 36 | 39
Commercial, Agricultural | Commercial |  |  |
Financing Receivable Impaired [Line Items] |  |  |
Unpaid Principal Balance, With no related allowance recorded | 0 |  |
Unpaid Principal Balance, With an allowance recorded | 0 | 219 |
Recorded Investment, With no related allowance recorded | 0 |  |
Recorded Investment, With an allowance recorded | 0 | 218 |
Allowance for Loan Losses Allocated | 0 | 107 |
Average Recorded Investment, With no related allowance recorded | 10 |  |
Average Recorded Investment, With an allowance recorded | 50 | 73 |
Interest Income Recognized, With no related allowance recorded | 0 |  |
Interest Income Recognized, With related allowance recorded | 0 | 0 |
Residential real estate, Home equity lines of credit | Residential real estate |  |  |
Financing Receivable Impaired [Line Items] |  |  |
Unpaid Principal Balance, With no related allowance recorded | 341 | 195 | 283
Unpaid Principal Balance, With an allowance recorded | 159 | 84 | 87
Recorded Investment, With no related allowance recorded | 319 | 179 | 268
Recorded Investment, With an allowance recorded | 156 | 84 | 87
Allowance for Loan Losses Allocated | 74 | 1 | 2
Average Recorded Investment, With no related allowance recorded | 299 | 221 | 260
Average Recorded Investment, With an allowance recorded | 95 | 85 | 96
Interest Income Recognized, With no related allowance recorded | 15 | 10 | 15
Interest Income Recognized, With related allowance recorded | $ 3 | $ 4 | $ 4

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