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Loans and Allowance for Loan Losses (Details 4) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Jun. 30, 2017 | Dec. 31, 2017
Commercial & Industrial [Member] |  |  |  |  |
Summary of Impaired loan activity |  |  |  |  |
With no related allowance recorded, Recorded Investment |  |  |  |  |
With no related allowance recorded, Unpaid Principal Balance |  |  |  |  |
With no related allowance recorded, Related Allowance |  |  |  |  |
With no related allowance recorded, Average Recorded Investment |  |  |  |  |
With no related allowance recorded, Interest Income Recognized |  |  |  |  |
With a specific allowance recorded, Recorded Investment |  |  |  |  |
With a specific allowance recorded, Unpaid Principal Balance |  |  |  |  |
With a specific allowance recorded, Related Allowance |  |  |  |  |
With a specific allowance recorded, Average Recorded Investment |  |  |  |  |
With a specific allowance recorded, Interest Income Recognized |  |  |  |  |
Total Recorded Investment |  |  |  |  |
Total Unpaid Principal Balance |  |  |  |  |
Total Related Allowance |  |  |  |  |
Total Average Recorded Investment |  |  |  |  |
Total Interest Income Recognized |  |  |  |  |
Commercial RE & Construction [Member] |  |  |  |  |
Summary of Impaired loan activity |  |  |  |  |
With no related allowance recorded, Recorded Investment | 294 |  | 294 |  | 696
With no related allowance recorded, Unpaid Principal Balance | 294 | 735 | 294 | 735 | 722
With no related allowance recorded, Related Allowance |  |  |  |  |
With no related allowance recorded, Average Recorded Investment | 337 | 758 | 337 | 735 | 756
With no related allowance recorded, Interest Income Recognized | 6 | 22 | 12 |  | 34
With a specific allowance recorded, Recorded Investment |  |  |  |  | 689
With a specific allowance recorded, Unpaid Principal Balance |  | 689 |  | 689 | 689
With a specific allowance recorded, Related Allowance |  |  |  |  | 146
With a specific allowance recorded, Average Recorded Investment |  | 738 |  | 689 | 713
With a specific allowance recorded, Interest Income Recognized |  | (2) |  |  |
Total Recorded Investment | 294 |  | 294 |  | 1,385
Total Unpaid Principal Balance | 294 | 1,424 | 294 | 1,424 | 1,411
Total Related Allowance |  |  |  |  | 146
Total Average Recorded Investment | 337 | 1,496 | 337 | 1,424 | 1,469
Total Interest Income Recognized | 6 | 20 | 12 |  | 34
Agricultural & Farmland [Member] |  |  |  |  |
Summary of Impaired loan activity |  |  |  |  |
With no related allowance recorded, Recorded Investment |  |  |  |  |
With no related allowance recorded, Unpaid Principal Balance |  |  |  |  |
With no related allowance recorded, Related Allowance |  |  |  |  |
With no related allowance recorded, Average Recorded Investment |  |  |  |  |
With no related allowance recorded, Interest Income Recognized |  |  |  |  |
With a specific allowance recorded, Recorded Investment |  |  |  |  |
With a specific allowance recorded, Unpaid Principal Balance |  |  |  |  |
With a specific allowance recorded, Related Allowance |  |  |  |  |
With a specific allowance recorded, Average Recorded Investment |  |  |  |  |
With a specific allowance recorded, Interest Income Recognized |  |  |  |  |
Total Recorded Investment |  |  |  |  |
Total Unpaid Principal Balance |  |  |  |  |
Total Related Allowance |  |  |  |  |
Total Average Recorded Investment |  |  |  |  |
Total Interest Income Recognized |  |  |  |  |
Residential Real Estate [Member] |  |  |  |  |
Summary of Impaired loan activity |  |  |  |  |
With no related allowance recorded, Recorded Investment | 1,275 |  | 1,275 |  | 752
With no related allowance recorded, Unpaid Principal Balance | 1,319 | 1,157 | 1,319 | 1,157 | 795
With no related allowance recorded, Related Allowance |  |  |  |  |
With no related allowance recorded, Average Recorded Investment | 1,996 | 1,351 | 2,000 | 1,114 | 1,460
With no related allowance recorded, Interest Income Recognized | 21 | 35 | 41 |  | 67
With a specific allowance recorded, Recorded Investment | 1,016 |  | 1,016 |  | 1,078
With a specific allowance recorded, Unpaid Principal Balance | 1,041 | 561 | 1,041 | 561 | 1,097
With a specific allowance recorded, Related Allowance | 136 |  | 136 |  | 178
With a specific allowance recorded, Average Recorded Investment | 569 | 634 | 572 | 561 | 628
With a specific allowance recorded, Interest Income Recognized | 7 | 13 | 14 |  | 25
Total Recorded Investment | 2,291 |  | 2,291 |  | 1,830
Total Unpaid Principal Balance | 2,360 | 1,718 | 2,360 | 1,718 | 1,892
Total Related Allowance | 136 |  | 136 |  | 178
Total Average Recorded Investment | 2,565 | 1,985 | 2,572 | 1,675 | 2,088
Total Interest Income Recognized | 28 | 48 | 55 |  | 92
Consumer & Other [Member] |  |  |  |  |
Summary of Impaired loan activity |  |  |  |  |
With no related allowance recorded, Recorded Investment | 100 |  | 100 |  | 110
With no related allowance recorded, Unpaid Principal Balance | 100 | 118 | 100 | 118 | 110
With no related allowance recorded, Related Allowance |  |  |  |  |
With no related allowance recorded, Average Recorded Investment | 114 | 145 | 116 | 118 | 128
With no related allowance recorded, Interest Income Recognized | 2 | 5 | 4 |  | 9
With a specific allowance recorded, Recorded Investment | 83 |  | 83 |  | 87
With a specific allowance recorded, Unpaid Principal Balance | 83 | 112 | 83 | 112 | 87
With a specific allowance recorded, Related Allowance | 4 |  | 4 |  | 5
With a specific allowance recorded, Average Recorded Investment | 84 | 118 | 85 | 112 | 91
With a specific allowance recorded, Interest Income Recognized | 1 | 3 | 3 |  | 5
Total Recorded Investment | 183 |  | 183 |  | 197
Total Unpaid Principal Balance | 183 | 230 | 183 | 230 | 197
Total Related Allowance | 4 |  | 4 |  | 5
Total Average Recorded Investment | 198 | 263 | 201 | $ 230 | 219
Total Interest Income Recognized | $ 3 | $ 8 | $ 7 |  | $ 14

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