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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 | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | $ 38,317 |
Current | 6,101,734 |
Loans, including unearned loan fees | 6,140,051 | $ 5,314,337
Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 29,307 |
Current | 3,113,890 |
Loans, including unearned loan fees | 3,143,197 |
CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 2,211 |
Current | 1,307,684 |
Loans, including unearned loan fees | 1,309,895 |
CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 3,931 |
Current | 734,618 |
Loans, including unearned loan fees | 738,549 |
Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 58 |
Current | 481,163 |
Loans, including unearned loan fees | 481,221 |
Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 2,689 |
Current | 324,303 |
Loans, including unearned loan fees | 326,992 |
Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 121 |
Current | 140,076 |
Loans, including unearned loan fees | 140,197 |
Financial Asset, 30 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 10,632 |
Financial Asset, 30 to 89 Days Past Due [Member] | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 6,684 |
Financial Asset, 30 to 89 Days Past Due [Member] | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 116 |
Financial Asset, 30 to 89 Days Past Due [Member] | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 2,723 |
Financial Asset, 30 to 89 Days Past Due [Member] | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 58 |
Financial Asset, 30 to 89 Days Past Due [Member] | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 951 |
Financial Asset, 30 to 89 Days Past Due [Member] | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 100 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 27,685 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 22,623 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 2,095 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 1,208 |
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 | 1,738 |
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | $ 21 |

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