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Loans and Allowance for Credit Losses (Details 6) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2018
Unpaid Contractual Principal Balance | $ 71,566 | $ 40,774 | $ 40,774
Recorded Investment With No Allowance | 56,165 | 13,166 | 13,166
Recorded Investment With Allowance | 10,273 | 27,136 | 27,136
Total Recorded Investment | 66,438 | 40,302 | 40,302
Related Allowance | 6,507 | 8,918 | 8,918
Average Recorded Investment | 53,371 | 36,463 | 30,955
Interest Income Recognized | 328 | 110 | 1,006
Commercial [Member] |  |  |
Unpaid Contractual Principal Balance | 13,453 | 8,613 | 8,613
Recorded Investment With No Allowance | 4,124 | 2,057 | 2,057
Recorded Investment With Allowance | 8,857 | 6,084 | 6,084
Total Recorded Investment | 12,981 | 8,141 | 8,141
Related Allowance | 5,892 | 4,803 | 4,803
Average Recorded Investment | 10,561 | 10,306 | 8,359
Interest Income Recognized | 19 | (126) | 190
Income Producing - Commercial Real Estate [Member] |  |  |
Unpaid Contractual Principal Balance | 42,939 | 21,402 | 21,402
Recorded Investment With No Allowance | 39,397 | 1,720 | 1,720
Recorded Investment With Allowance | 46 | 19,682 | 19,682
Total Recorded Investment | 39,443 | 21,402 | 21,402
Related Allowance | 15 | 2,465 | 2,465
Average Recorded Investment | 30,423 | 15,331 | 12,309
Interest Income Recognized | 263 | 189 | 550
Owner Occupied - Commercial Real Estate - [Member] |  |  |
Unpaid Contractual Principal Balance | 4,853 | 5,731 | 5,731
Recorded Investment With No Allowance | 3,483 | 4,361 | 4,361
Recorded Investment With Allowance | 1,370 | 1,370 | 1,370
Total Recorded Investment | 4,853 | 5,731 | 5,731
Related Allowance | 600 | 600 | 600
Average Recorded Investment | 5,292 | 5,746 | 6,011
Interest Income Recognized | 46 | 47 | 196
Real Estate Mortgage Residential [Member] |  |  |
Unpaid Contractual Principal Balance | 5,644 | 1,510 | 1,510
Recorded Investment With No Allowance | 5,644 | 1,510 | 1,510
Total Recorded Investment | 5,644 | 1,510 | 1,510
Average Recorded Investment | 3,577 | 1,516 | 1,688
Interest Income Recognized |  |  | 2
Construction - Commercial and Residential [Member] |  |  |
Unpaid Contractual Principal Balance | 4,190 | 3,031 | 3,031
Recorded Investment With No Allowance | 3,030 | 3,031 | 3,031
Total Recorded Investment | 3,030 | 3,031 | 3,031
Related Allowance |  | 1,050 | 1,050
Average Recorded Investment | 3,031 | 3,031 | 2,028
Interest Income Recognized |  |  | 68
Home Equity [Member] |  |  |
Unpaid Contractual Principal Balance | 487 | 487 | 487
Recorded Investment With No Allowance | 487 | 487 | 487
Total Recorded Investment | 487 | 487 | 487
Average Recorded Investment | $ 487 | 487 | 491
Other Consumer [Member] |  |  |
Average Recorded Investment |  | $ 46 | $ 69

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