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Loans and Allowance for Loan Losses (Details 4) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Mar. 31, 2018 | Dec. 31, 2018
Commercial & industrial [Member] |  |  |
Summary of Impaired loan activity |  |  |
With no related allowance recorded, Recorded Investment | $ 948 |  | $ 605
With no related allowance recorded, Unpaid Principal Balance | 1,233 | $ 32 | 832
With no related allowance recorded, Related Allowance |  |  |
With no related allowance recorded, Average Recorded Investment | 949 | 32 | 405
With no related allowance recorded, Interest Income Recognized | 25 |  | 23
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 | 948 |  | 730
Total Unpaid Principal Balance | 1,223 | 32 | 957
Total Related Allowance |  |  | 61
Total Average Recorded Investment | 949 | 32 | 532
Total Interest Income Recognized | 25 |  | 44
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 | 212 |  | 218
With no related allowance recorded, Unpaid Principal Balance | 212 | 506 | 218
With no related allowance recorded, Related Allowance |  |  |
With no related allowance recorded, Average Recorded Investment | 259 | 480 | 260
With no related allowance recorded, Interest Income Recognized | 7 |  | 17
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 | 212 |  | 218
Total Unpaid Principal Balance | 212 | 506 | 218
Total Related Allowance |  |  |
Total Average Recorded Investment | 259 | 480 | 260
Total Interest Income Recognized | 7 |  | 17
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 | 1,337 |  | 1,376
With no related allowance recorded, Unpaid Principal Balance | 1,380 | 1,485 | 1,419
With no related allowance recorded, Related Allowance |  |  |
With no related allowance recorded, Average Recorded Investment | 1,608 | 1,442 | 1,656
With no related allowance recorded, Interest Income Recognized | 24 |  | 90
With a specific allowance recorded, Recorded Investment | 971 |  | 933
With a specific allowance recorded, Unpaid Principal Balance | 971 | 1,160 | 959
With a specific allowance recorded, Related Allowance | 89 |  | 76
With a specific allowance recorded, Average Recorded Investment | 1,003 | 1,141 | 993
With a specific allowance recorded, Interest Income Recognized | 12 |  | 35
Total Recorded Investment | 2,308 |  | 2,309
Total Unpaid Principal Balance | 2,351 | 2,645 | 2,378
Total Related Allowance | 89 |  | 76
Total Average Recorded Investment | 2,611 | 2,583 | 2,649
Total Interest Income Recognized | 36 |  | 125
HELOC [Member] |  |  |
Summary of Impaired loan activity |  |  |
With no related allowance recorded, Recorded Investment | 18 |  | 20
With no related allowance recorded, Unpaid Principal Balance | 18 |  | 20
With no related allowance recorded, Related Allowance |  |  |
With no related allowance recorded, Average Recorded Investment | 20 |  | 21
With no related allowance recorded, Interest Income Recognized |  |  | 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 | 18 |  | 20
Total Unpaid Principal Balance | 18 |  | 20
Total Related Allowance |  |  |
Total Average Recorded Investment | 20 |  | 21
Total Interest Income Recognized |  |  | 1
Consumer [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 | 20 |  | 7
With a specific allowance recorded, Unpaid Principal Balance | 20 | 10 | 7
With a specific allowance recorded, Related Allowance | 1 |  | 1
With a specific allowance recorded, Average Recorded Investment | 21 | 10 | 8
With a specific allowance recorded, Interest Income Recognized |  |  | 1
Total Recorded Investment | 20 |  | 7
Total Unpaid Principal Balance | 20 | 10 | 7
Total Related Allowance | 1 |  | 1
Total Average Recorded Investment | 21 | $ 10 | 8
Total Interest Income Recognized |  |  | $ 1

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