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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 | Jun. 30, 2016 | Dec. 31, 2015
--- | --- | ---
Financing Receivable, Recorded Investment [Line Items] |  |
Loans and Leases Receivable, Gross | $ 2,883,909 | $ 2,750,737
Non-Covered Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 2,884,159 | 2,750,446
Loans and Leases Receivable, Gross | 2,883,909 | 2,750,737
Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 1,540,457 | 1,484,327
Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 332,639 | 342,959
Non-Covered Loans | Commercial Real Estate Investor Owned |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 466,713 | 428,064
Non-Covered Loans | Construction and land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 171,778 | 161,061
Non-Covered Loans | Residential real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 211,155 | 196,498
Non-Covered Loans | Consumer and other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 161,417 | 137,537
Loans and Leases Receivable, Gross | 161,167 | 137,828
Pass (1-6) | Non-Covered Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 2,666,324 | 2,541,405
Pass (1-6) | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 1,396,684 | 1,356,864
Pass (1-6) | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 302,411 | 314,791
Pass (1-6) | Non-Covered Loans | Commercial Real Estate Investor Owned |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 448,321 | 403,820
Pass (1-6) | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 161,528 | 146,601
Pass (1-6) | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 202,880 | 188,269
Pass (1-6) | Non-Covered Loans | Consumer and other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 154,500 | 131,060
Watch (7) | Non-Covered Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 134,954 | 149,938
Watch (7) | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 82,775 | 90,370
Watch (7) | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 27,144 | 24,727
Watch (7) | Non-Covered Loans | Commercial Real Estate Investor Owned |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 13,223 | 18,868
Watch (7) | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 6,258 | 10,114
Watch (7) | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 4,840 | 5,138
Watch (7) | Non-Covered Loans | Consumer and other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 714 | 721
Substandard (8) | Non-Covered Loans |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 82,631 | 59,394
Substandard (8) | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 60,998 | 37,093
Substandard (8) | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 3,084 | 3,441
Substandard (8) | Non-Covered Loans | Commercial Real Estate Investor Owned |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 5,169 | 5,376
Substandard (8) | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 3,992 | 4,346
Substandard (8) | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 3,435 | 3,091
Substandard (8) | Non-Covered Loans | Consumer and other |  |
Financing Receivable, Recorded Investment [Line Items] |  |
Portfolio loans | 5,953 | 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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