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Loans - Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category (Details) - Non-Covered Loans - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | $ 39,117 | $ 42,573
Current | 7,187,150 | 7,182,362
Loans, including unearned loan fees | 7,226,267 | 7,224,935
Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 23,492 | 21,580
Current | 2,907,313 | 3,067,415
Loans, including unearned loan fees | 2,930,805 | 3,088,995
CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 7,765 | 10,035
Current | 1,638,256 | 1,579,384
Loans, including unearned loan fees | 1,646,021 | 1,589,419
CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 5,222 | 4,975
Current | 1,549,505 | 1,493,433
Loans, including unearned loan fees | 1,554,727 | 1,498,408
Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 165 | 13
Current | 556,611 | 546,673
Loans, including unearned loan fees | 556,776 | 546,686
Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 2,386 | 4,189
Current | 303,111 | 314,990
Loans, including unearned loan fees | 305,497 | 319,179
Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 87 | 1,781
Current | 232,354 | 180,467
Loans, including unearned loan fees | 232,441 | 182,248
Financial Asset, 30 to 89 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 14,608 | 13,529
Financial Asset, 30 to 89 Days Past Due [Member] | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 8,245 | 8,652
Financial Asset, 30 to 89 Days Past Due [Member] | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 1,065 | 734
Financial Asset, 30 to 89 Days Past Due [Member] | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 4,710 | 328
Financial Asset, 30 to 89 Days Past Due [Member] | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 65 | 13
Financial Asset, 30 to 89 Days Past Due [Member] | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 461 | 2,071
Financial Asset, 30 to 89 Days Past Due [Member] | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 62 | 1,731
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 24,509 | 29,044
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 15,247 | 12,928
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 6,700 | 9,301
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 512 | 4,647
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 100 | 0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | 1,925 | 2,118
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total Past Due | $ 25 | $ 50

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