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Purchased Credit Impaired ("PCI") Loans - Summary of Aging of Recorded Investment in Past Due PCI Loans by Portfolio Class and Category (Details) - Covered Loans - USD ($) $ in Thousands | Jun. 30, 2019 | Dec. 31, 2018
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Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | $ 3,138 | $ 1,153
90 or More Days Past Due | 3,687 | 6,404
Total Past Due | 6,825 | 7,557
Current | 96,490 | 38,844
Total | 103,315 | 46,401
Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | 1,525 | 0
90 or More Days Past Due | 0 | 0
Total Past Due | 1,525 | 0
Current | 15,384 | 2,159
Total | 16,909 | 2,159
CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | 1,317 | 416
90 or More Days Past Due | 1,917 | 88
Total Past Due | 3,234 | 504
Current | 38,754 | 23,435
Total | 41,988 | 23,939
CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | 0 | 591
90 or More Days Past Due | 1,381 | 6,279
Total Past Due | 1,381 | 6,870
Current | 21,235 | 2,799
Total | 22,616 | 9,669
Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | 70 | 0
90 or More Days Past Due | 154 | 0
Total Past Due | 224 | 0
Current | 7,963 | 4,548
Total | 8,187 | 4,548
Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | 226 | 146
90 or More Days Past Due | 235 | 37
Total Past Due | 461 | 183
Current | 12,911 | 5,899
Total | 13,372 | 6,082
Consumer and other |  |
Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | 0 | 0
90 or More Days Past Due | 0 | 0
Total Past Due | 0 | 0
Current | 243 | 4
Total | $ 243 | $ 4

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