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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 | Dec. 31, 2019 | Dec. 31, 2018
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Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | $ 2,041 | $ 1,153
90 or More Days Past Due | 3,339 | 6,404
Total Past Due | 5,380 | 7,557
Current | 84,909 | 38,844
Total | 90,289 | 46,401
Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | 0 | 0
90 or More Days Past Due | 356 | 0
Total Past Due | 356 | 0
Current | 14,978 | 2,159
Total | 15,334 | 2,159
CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | 1,250 | 416
90 or More Days Past Due | 1,340 | 88
Total Past Due | 2,590 | 504
Current | 34,313 | 23,435
Total | 36,903 | 23,939
CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | 0 | 591
90 or More Days Past Due | 434 | 6,279
Total Past Due | 434 | 6,870
Current | 18,481 | 2,799
Total | 18,915 | 9,669
Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | 0 | 0
90 or More Days Past Due | 217 | 0
Total Past Due | 217 | 0
Current | 7,676 | 4,548
Total | 7,893 | 4,548
Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
30-89 Days Past Due | 791 | 146
90 or More Days Past Due | 992 | 37
Total Past Due | 1,783 | 183
Current | 9,286 | 5,899
Total | 11,069 | 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 | 175 | 4
Total | $ 175 | $ 4

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