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Loans - Summary of Aging of Recorded Investment in Past Due Portfolio Loans by Portfolio Class and Category (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Total | $ 10,011,918 | $ 9,737,138
Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 10,018,815 | 9,744,427
Loans, including unearned loan fees | 10,011,918 | 9,737,138
Unearned loan fees, net | (6,897) | (7,289)
Financing Receivable, Covered, After Allowance For Credit Loss And Unearned Loan Fees, Net | 10,018,815 | 9,744,427
Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 4,032,189 | 3,859,964
Loans, including unearned loan fees | 4,032,189 | 3,859,964
Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,418,079 | 2,357,820
Loans, including unearned loan fees | 2,418,079 | 2,357,820
Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,281,223 | 2,270,551
Loans, including unearned loan fees | 2,281,223 | 2,270,551
Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 663,264 | 611,565
Loans, including unearned loan fees | 663,264 | 611,565
Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 364,059 | 395,537
Loans, including unearned loan fees | 364,059 | 395,537
Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 260,001 | 248,990
Loans, including unearned loan fees | 260,001 | 248,990
Total Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process | 18,159 | 15,373
Total Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 5,138 | 2,928
Total Past Due | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 3,184 | 1,135
Total Past Due | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 6,864 | 8,792
Total Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 396 | 1,201
Total Past Due | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,414 | 1,227
Total Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 163 | 90
30-89 Days Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process | 11,071 | 10,437
30-89 Days Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 3,244 | 555
30-89 Days Past Due | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,086 | 0
30-89 Days Past Due | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,780 | 8,628
30-89 Days Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 396 | 9
30-89 Days Past Due | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,414 | 1,227
30-89 Days Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 151 | 18
90 or More Days Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process | 7,088 | 4,936
90 or More Days Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,894 | 2,373
90 or More Days Past Due | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 1,098 | 1,135
90 or More Days Past Due | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 4,084 | 164
90 or More Days Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 1,192
90 or More Days Past Due | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 0 | 0
90 or More Days Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 12 | 72
Current | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss, Fee and Loan in Process | 10,000,656 | 9,729,054
Current | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 4,027,051 | 3,857,036
Current | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,414,895 | 2,356,685
Current | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 2,274,359 | 2,261,759
Current | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 662,868 | 610,364
Current | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total | 361,645 | 394,310
Current | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Total | $ 259,838 | $ 248,900

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