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Loans - Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category (Details) - Non-Covered Loans - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | $ 52,110 |
Current | 5,405,407 |
Loans, including unearned loan fees | 5,457,517 | $ 5,314,337
Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 34,389 |
Current | 2,434,624 |
Loans, including unearned loan fees | 2,469,013 |
CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 5,434 |
Current | 1,322,380 |
Loans, including unearned loan fees | 1,327,814 |
CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 5,052 |
Current | 715,491 |
Loans, including unearned loan fees | 720,543 |
Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 95 |
Current | 469,532 |
Loans, including unearned loan fees | 469,627 |
Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 6,606 |
Current | 340,152 |
Loans, including unearned loan fees | 346,758 |
Consumer and other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 534 |
Current | 123,228 |
Loans, including unearned loan fees | 123,762 |
Financial Asset, 30 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 36,442 |
Financial Asset, 30 to 89 Days Past Due [Member] | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 24,898 |
Financial Asset, 30 to 89 Days Past Due [Member] | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 1,996 |
Financial Asset, 30 to 89 Days Past Due [Member] | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 3,870 |
Financial Asset, 30 to 89 Days Past Due [Member] | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 95 |
Financial Asset, 30 to 89 Days Past Due [Member] | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 5,124 |
Financial Asset, 30 to 89 Days Past Due [Member] | Consumer and other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 459 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 15,668 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 9,491 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 3,438 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 1,182 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 0 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 1,482 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Consumer and other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | $ 75 |

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