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Loans - Loans Outstanding by Portfolio Class (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Mar. 31, 2021 | Dec. 31, 2020 | Jun. 30, 2020 | Mar. 31, 2020 | Dec. 31, 2019
--- | --- | --- | --- | --- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | $ 3,519,519 |  | $ 3,867,383 |  |  |
Allowance for credit losses | (55,649) | $ (57,186) | (57,027) | $ (55,090) | $ (48,440) | $ (17,667)
Net loans | 3,463,870 |  | 3,810,356 |  |  |
Commercial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 2,104,627 |  | 2,192,271 |  |  |
Allowance for credit losses | (41,766) | (42,980) | (42,210) | (39,147) | (32,550) | (11,996)
Commercial | Owner occupied real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 475,908 |  | 496,306 |  |  |
Commercial | Non–owner occupied real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 995,314 |  | 999,636 |  |  |
Commercial | Residential spec homes |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 9,215 |  | 10,070 |  |  |
Commercial | Development & spec land |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 23,188 |  | 26,372 |  |  |
Commercial | Commercial and industrial |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 601,002 |  | 659,887 |  |  |
Real estate |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 764,748 |  | 1,019,912 |  |  |
Allowance for credit losses | (4,108) | (4,229) | (4,620) | (5,832) | (5,654) | (923)
Real estate | Residential mortgage |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 537,259 |  | 598,700 |  |  |
Real estate | Residential construction |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 22,178 |  | 25,586 |  |  |
Real estate | Mortgage warehouse |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 205,311 |  | 395,626 |  |  |
Consumer |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 650,144 |  | 655,200 |  |  |
Allowance for credit losses | (8,620) | $ (8,814) | (8,930) | $ (8,921) | $ (9,181) | $ (3,671)
Consumer | Direct installment |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 36,189 |  | 38,046 |  |  |
Consumer | Indirect installment |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | 358,161 |  | 357,511 |  |  |
Consumer | Home equity |  |  |  |  |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |  |  |  |  |
Total loans | $ 255,794 |  | $ 259,643 |  |  |

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