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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, 2022 | Dec. 31, 2021
--- | --- | ---
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 9,056,073 | $ 9,017,642
Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 9,064,414 | 9,026,780
Loans, including unearned loan fees | 9,056,073 | 9,017,642
Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,400,574 | 3,396,590
Loans, including unearned loan fees | 3,398,723 | 3,392,375
Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,184,126 | 2,141,143
Loans, including unearned loan fees | 2,184,126 | 2,141,143
Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,094,012 | 2,035,785
Loans, including unearned loan fees | 2,094,012 | 2,035,785
Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 702,630 | 734,073
Loans, including unearned loan fees | 702,630 | 734,073
Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 432,639 | 454,052
Loans, including unearned loan fees | 432,639 | 454,052
Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 250,433 | 265,137
Loans, including unearned loan fees | 243,943 | 260,214
Total Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 24,419 | 57,402
Total Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 8,290 | 38,605
Total Past Due | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,026 | 3,880
Total Past Due | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 6,390 | 10,359
Total Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,680 | 24
Total Past Due | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,988 | 4,486
Total Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 45 | 48
30-89 Days Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 15,488 | 41,639
30-89 Days Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,086 | 24,447
30-89 Days Past Due | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,461 | 3,880
30-89 Days Past Due | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 4,692 | 10,070
30-89 Days Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,680 | 24
30-89 Days Past Due | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,534 | 3,181
30-89 Days Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 35 | 37
90 or More Days Past Due | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 8,931 | 15,763
90 or More Days Past Due | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 5,204 | 14,158
90 or More Days Past Due | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,565 | 0
90 or More Days Past Due | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 1,698 | 289
90 or More Days Past Due | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 0 | 0
90 or More Days Past Due | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 454 | 1,305
90 or More Days Past Due | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 10 | 11
Current | Non-Covered Loans |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 9,031,654 | 8,960,240
Current | Non-Covered Loans | Commercial and industrial |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 3,390,433 | 3,353,770
Current | Non-Covered Loans | CRE - investor owned |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,181,100 | 2,137,263
Current | Non-Covered Loans | CRE - owner occupied |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 2,087,622 | 2,025,426
Current | Non-Covered Loans | Construction and land development |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 699,950 | 734,049
Current | Non-Covered Loans | Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | 428,651 | 449,566
Current | Non-Covered Loans | Other |  |
Financing Receivable, Past Due [Line Items] |  |
Financing Receivable, before Allowance for Credit Loss | $ 243,898 | $ 260,166

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