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Portfolio Loans - Summary of Recorded Investment by Risk Category of Portfolio Loans by Portfolio Class and Category (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, including unearned loan fees | $ 5,314,337 | $ 4,350,001
Non-Covered Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 5,226,664 | 4,305,626
Loans, including unearned loan fees | 5,224,048 | 4,303,600
Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,345,823 | 2,121,008
Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 1,262,981 | 843,728
Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 678,522 | 604,498
Non-Covered Loans | Construction and land development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 449,380 | 330,097
Non-Covered Loans | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 355,192 | 298,944
Non-Covered Loans | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 134,766 | 107,351
Loans, including unearned loan fees | 132,150 | 105,325
Pass (1-6) | Non-Covered Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, including unearned loan fees | 4,954,405 | 4,025,173
Pass (1-6) | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,151,084 | 1,927,782
Pass (1-6) | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 1,242,569 | 823,128
Pass (1-6) | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 643,276 | 563,003
Pass (1-6) | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 437,134 | 318,451
Pass (1-6) | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 348,246 | 287,802
Pass (1-6) | Non-Covered Loans | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, including unearned loan fees | 132,096 | 105,007
Watch (7) | Non-Covered Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, including unearned loan fees | 187,656 | 208,768
Watch (7) | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 124,718 | 146,033
Watch (7) | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 17,572 | 15,083
Watch (7) | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 28,773 | 31,834
Watch (7) | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 12,140 | 11,580
Watch (7) | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 4,450 | 4,232
Watch (7) | Non-Covered Loans | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, including unearned loan fees | 3 | 6
Classified (8 & 9) | Non-Covered Loans |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, including unearned loan fees | 81,987 | 69,659
Classified (8 & 9) | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 70,021 | 47,193
Classified (8 & 9) | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,840 | 5,517
Classified (8 & 9) | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 6,473 | 9,661
Classified (8 & 9) | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 106 | 66
Classified (8 & 9) | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | 2,496 | 6,910
Classified (8 & 9) | Non-Covered Loans | Consumer and other |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Loans, including unearned loan fees | $ 51 | $ 312

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