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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, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2018
Commercial & industrial [Member] |  |  |  |  |
Summary of Impaired loan activity |  |  |  |  |
With no related allowance recorded, Recorded Investment | $ 624 |  | $ 624 |  | $ 575
With no related allowance recorded, Unpaid Principal Balance | 899 | $ 32 | 899 | $ 32 | 802
With no related allowance recorded, Related Allowance |  |  |  |  |
With no related allowance recorded, Average Recorded Investment | 1,226 |  | 1,275 |  | 370
With no related allowance recorded, Interest Income Recognized | 19 |  | 44 |  | 21
With a specific allowance recorded, Recorded Investment |  |  |  |  | 125
With a specific allowance recorded, Unpaid Principal Balance |  |  |  |  | 125
With a specific allowance recorded, Related Allowance |  |  |  |  | 61
With a specific allowance recorded, Average Recorded Investment |  |  |  |  | 127
With a specific allowance recorded, Interest Income Recognized |  |  |  |  | 21
Total Recorded Investment | 624 |  | 624 |  | 700
Total Unpaid Principal Balance | 899 | 32 | 899 | 32 | 927
Total Related Allowance |  |  |  |  | 61
Total Average Recorded Investment | 1,226 |  | 1,275 |  | 497
Total Interest Income Recognized | 19 |  | 44 |  | 42
Commercial real estate - owner occupied [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 real estate - nonowner occupied [Member] |  |  |  |  |
Summary of Impaired loan activity |  |  |  |  |
With no related allowance recorded, Recorded Investment | 208 |  | 208 |  | 283
With no related allowance recorded, Unpaid Principal Balance | 208 | 506 | 208 | 506 | 283
With no related allowance recorded, Related Allowance |  |  |  |  |
With no related allowance recorded, Average Recorded Investment | 259 | 337 | 259 | 337 | 336
With no related allowance recorded, Interest Income Recognized | 3 | 6 | 10 | 12 | 21
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 | 208 |  | 208 |  | 283
Total Unpaid Principal Balance | 208 | 506 | 208 | 506 | 283
Total Related Allowance |  |  |  |  |
Total Average Recorded Investment | 259 | 337 | 259 | 337 | 336
Total Interest Income Recognized | 3 | 6 | 10 | 12 | 21
Agricultural [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 | 1,746 |  | 1,746 |  | 1,249
With no related allowance recorded, Unpaid Principal Balance | 1,789 | 1,485 | 1,789 | 1,485 | 1,292
With no related allowance recorded, Related Allowance |  |  |  |  |
With no related allowance recorded, Average Recorded Investment | 2,055 | 1,996 | 2,065 | 2,000 | 1,995
With no related allowance recorded, Interest Income Recognized | 27 | 21 | 56 | 41 | 91
With a specific allowance recorded, Recorded Investment | 526 |  | 526 |  | 862
With a specific allowance recorded, Unpaid Principal Balance | 526 | 1,160 | 526 | 1,160 | 888
With a specific allowance recorded, Related Allowance | 47 |  | 47 |  | 73
With a specific allowance recorded, Average Recorded Investment | 531 | 569 | 534 | 572 | 426
With a specific allowance recorded, Interest Income Recognized | 7 | 7 | 12 | 14 | 20
Total Recorded Investment | 2,272 |  | 2,272 |  | 2,111
Total Unpaid Principal Balance | 2,351 | 2,645 | 2,351 | 2,645 | 21,180
Total Related Allowance | 47 |  | 47 |  | 73
Total Average Recorded Investment | 2,586 | 2,565 | 2,599 | 2,572 | 2,421
Total Interest Income Recognized | 34 | 28 | 68 | 55 | 111
HELOC [Member] |  |  |  |  |
Summary of Impaired loan activity |  |  |  |  |
With no related allowance recorded, Recorded Investment | 17 |  | 17 |  | 20
With no related allowance recorded, Unpaid Principal Balance | 17 |  | 17 |  | 20
With no related allowance recorded, Related Allowance |  |  |  |  |
With no related allowance recorded, Average Recorded Investment | 19 |  | 19 |  | 21
With no related allowance recorded, Interest Income Recognized |  |  | 1 |  | 1
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 | 17 |  | 17 |  | 20
Total Unpaid Principal Balance | 17 |  | 17 |  | 20
Total Related Allowance |  |  |  |  |
Total Average Recorded Investment | 19 |  | 19 |  | 21
Total Interest Income Recognized |  |  | 1 |  | 1
Consumer [Member] |  |  |  |  |
Summary of Impaired loan activity |  |  |  |  |
With no related allowance recorded, Recorded Investment | 19 |  | 19 |  | 93
With no related allowance recorded, Unpaid Principal Balance | 19 |  | 19 |  | 93
With no related allowance recorded, Related Allowance |  |  |  |  |
With no related allowance recorded, Average Recorded Investment | 20 | 114 | 20 | 116 | 104
With no related allowance recorded, Interest Income Recognized |  | 2 | 1 | 4 | 7
With a specific allowance recorded, Recorded Investment |  |  |  |  | 77
With a specific allowance recorded, Unpaid Principal Balance |  | 10 |  | 10 | 77
With a specific allowance recorded, Related Allowance |  |  |  |  | 4
With a specific allowance recorded, Average Recorded Investment |  | 84 |  | 85 | 91
With a specific allowance recorded, Interest Income Recognized |  | 1 |  | 3 | 6
Total Recorded Investment | 19 |  | 19 |  | 170
Total Unpaid Principal Balance | 19 | 10 | 19 | 10 | 170
Total Related Allowance |  |  |  |  | 4
Total Average Recorded Investment | 20 | 198 | 20 | 201 | 195
Total Interest Income Recognized |  | $ 3 | $ 1 | $ 7 | $ 13

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