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Loans - Summary of Portfolio Loans by Category (Details) - Portfolio loans, net - USD ($) $ in Thousands | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | $ 6,164,492 | $ 5,316,953
Unearned loan fees, net | (24,441) | (2,616)
Loans, including unearned loan fees | 6,140,051 | 5,314,337
Commercial and industrial |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 3,165,611 | 2,361,157
Loans, including unearned loan fees | 3,143,197 |
Commercial - investor owned |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 1,309,895 | 1,299,884
Loans, including unearned loan fees | 1,309,895 |
Commercial - owner occupied |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 738,549 | 697,437
Loans, including unearned loan fees | 738,549 |
Construction and land development |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 481,221 | 457,273
Loans, including unearned loan fees | 481,221 |
Residential |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 326,992 | 366,261
Loans, including unearned loan fees | 326,992 |
Total real estate loans |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 2,856,657 | 2,820,855
Other |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Loans, before unearned loan fees | 142,224 | $ 134,941
Loans, including unearned loan fees | $ 140,197 |

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