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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 | Sep. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable, Gross | $ 3,037,705 | $ 2,750,737
Non-Covered Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 3,038,137 | 2,750,446
Loans and Leases Receivable, Gross | 3,037,705 | 2,750,737
Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 1,598,815 | 1,484,327
Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 340,916 | 342,959
Non-Covered Loans | Commercial Real Estate Investor Owned |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 515,055 | 428,064
Non-Covered Loans | Construction and land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 188,856 | 161,061
Non-Covered Loans | Residential real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 233,960 | 196,498
Non-Covered Loans | Consumer and other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 160,535 | 137,537
Loans and Leases Receivable, Gross | 160,103 | 137,828
Pass (1-6) | Non-Covered Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 2,829,644 | 2,541,405
Pass (1-6) | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 1,457,729 | 1,356,864
Pass (1-6) | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 311,427 | 314,791
Pass (1-6) | Non-Covered Loans | Commercial Real Estate Investor Owned |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 501,228 | 403,820
Pass (1-6) | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 179,515 | 146,601
Pass (1-6) | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 226,287 | 188,269
Pass (1-6) | Non-Covered Loans | Consumer and other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 153,458 | 131,060
Watch (7) | Non-Covered Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 109,475 | 149,938
Watch (7) | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 63,572 | 90,370
Watch (7) | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 25,369 | 24,727
Watch (7) | Non-Covered Loans | Commercial Real Estate Investor Owned |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 9,549 | 18,868
Watch (7) | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 6,050 | 10,114
Watch (7) | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 4,224 | 5,138
Watch (7) | Non-Covered Loans | Consumer and other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 711 | 721
Substandard (8) | Non-Covered Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 98,586 | 59,394
Substandard (8) | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 77,514 | 37,093
Substandard (8) | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 4,120 | 3,441
Substandard (8) | Non-Covered Loans | Commercial Real Estate Investor Owned |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 4,278 | 5,376
Substandard (8) | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 3,291 | 4,346
Substandard (8) | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 3,449 | 3,091
Substandard (8) | Non-Covered Loans | Consumer and other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 5,934 | 6,047
Doubtful (9) | Non-Covered Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 0 | 0
Doubtful (9) | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 0 | 0
Doubtful (9) | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 0 | 0
Doubtful (9) | Non-Covered Loans | Commercial Real Estate Investor Owned |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 0 | 0
Doubtful (9) | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 0 | 0
Doubtful (9) | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 0 | 0
Doubtful (9) | Non-Covered Loans | Consumer and other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | $ 0 | $ 0

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