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Loans and Allowance for Loan Losses (Details 4) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 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 | 548 |  | 696
With no related allowance recorded, Unpaid Principal Balance | 575 |  | 722
With no related allowance recorded, Related Allowance |  |  |
With no related allowance recorded, Average Recorded Investment | 725 | 644 | 756
With no related allowance recorded, Interest Income Recognized | 6 | 12 | 34
With a specific allowance recorded, Recorded Investment |  |  | 689
With a specific allowance recorded, Unpaid Principal Balance |  |  | 689
With a specific allowance recorded, Related Allowance |  |  | 146
With a specific allowance recorded, Average Recorded Investment |  | 788 | 713
With a specific allowance recorded, Interest Income Recognized |  | (2) |
Total Recorded Investment | 548 |  | 1,385
Total Unpaid Principal Balance | 575 |  | 1,411
Total Related Allowance |  |  | 146
Total Average Recorded Investment | 725 | 1,432 | 1,469
Total Interest Income Recognized | 6 | 10 | 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 | 1,301 |  | 752
With no related allowance recorded, Unpaid Principal Balance | 1,344 |  | 795
With no related allowance recorded, Related Allowance |  |  |
With no related allowance recorded, Average Recorded Investment | 2,005 | 1,355 | 1,460
With no related allowance recorded, Interest Income Recognized | 20 | 18 | 67
With a specific allowance recorded, Recorded Investment | 1,066 |  | 1,078
With a specific allowance recorded, Unpaid Principal Balance | 1,085 |  | 1,097
With a specific allowance recorded, Related Allowance | 170 |  | 178
With a specific allowance recorded, Average Recorded Investment | 613 | 637 | 628
With a specific allowance recorded, Interest Income Recognized | 7 | 7 | 25
Total Recorded Investment | 2,367 |  | 1,830
Total Unpaid Principal Balance | 2,429 |  | 1,892
Total Related Allowance | 170 |  | 178
Total Average Recorded Investment | 2,618 | 1,992 | 2,088
Total Interest Income Recognized | 27 | 25 | 92
Consumer & Other [Member] |  |  |
Summary of Impaired loan activity |  |  |
With no related allowance recorded, Recorded Investment | 105 |  | 110
With no related allowance recorded, Unpaid Principal Balance | 104 |  | 110
With no related allowance recorded, Related Allowance |  |  |
With no related allowance recorded, Average Recorded Investment | 118 | 139 | 128
With no related allowance recorded, Interest Income Recognized | 2 | 2 | 9
With a specific allowance recorded, Recorded Investment | 85 |  | 87
With a specific allowance recorded, Unpaid Principal Balance | 85 |  | 87
With a specific allowance recorded, Related Allowance | 4 |  | 5
With a specific allowance recorded, Average Recorded Investment | 86 | 167 | 91
With a specific allowance recorded, Interest Income Recognized | 1 | 1 | 5
Total Recorded Investment | 190 |  | 197
Total Unpaid Principal Balance | 189 |  | 197
Total Related Allowance | 4 |  | 5
Total Average Recorded Investment | 204 | 306 | 219
Total Interest Income Recognized | $ 3 | $ 3 | $ 14

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