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Loans - Summary of Recorded Investment by Risk Category of Portfolio Loans by Portfolio Class and Category (Details) - Non-Covered Loans - USD ($) $ in Thousands | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | $ 37,204 | $ 26,425
Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 18,687 |
Residential Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 4,141 |
Blanket Lien |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 5,910 |
Commercial and industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 26,531 | 22,578
Commercial and industrial | Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 13,051 |
Commercial and industrial | Residential Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 0 |
Commercial and industrial | Blanket Lien |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 5,910 |
CRE - investor owned |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 4,115 | 2,303
CRE - investor owned | Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 4,115 |
CRE - investor owned | Residential Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 0 |
CRE - investor owned | Blanket Lien |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 0 |
CRE - owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 2,110 | 213
CRE - owner occupied | Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 1,521 |
CRE - owner occupied | Residential Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 0 |
CRE - owner occupied | Blanket Lien |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 0 |
Construction and land development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 214 |
Construction and land development | Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 0 |
Construction and land development | Residential Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 214 |
Construction and land development | Blanket Lien |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 0 |
Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 4,154 | 1,330
Residential real estate | Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 0 |
Residential real estate | Residential Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 3,927 |
Residential real estate | Blanket Lien |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | 0 |
Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees | $ 80 | 1
Pass (1-6) |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 4,954,405
Pass (1-6) | Commercial and industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 2,151,084
Pass (1-6) | CRE - investor owned |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 1,242,569
Pass (1-6) | CRE - owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 643,276
Pass (1-6) | Construction and land development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 437,134
Pass (1-6) | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 348,246
Pass (1-6) | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 132,096
Watch (7) |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 187,656
Watch (7) | Commercial and industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 124,718
Watch (7) | CRE - investor owned |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 17,572
Watch (7) | CRE - owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 28,773
Watch (7) | Construction and land development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 12,140
Watch (7) | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 4,450
Watch (7) | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 3
Classified (8 & 9) |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 81,987
Classified (8 & 9) | Commercial and industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 70,021
Classified (8 & 9) | CRE - investor owned |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 2,840
Classified (8 & 9) | CRE - owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 6,473
Classified (8 & 9) | Construction and land development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 106
Classified (8 & 9) | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 2,496
Classified (8 & 9) | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 51
Total |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 5,224,048
Total | Commercial and industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 2,345,823
Total | CRE - investor owned |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 1,262,981
Total | CRE - owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 678,522
Total | Construction and land development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 449,380
Total | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | 355,192
Total | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, before unearned loan fees |  | $ 132,150

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