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Loans and Allowance for Credit Losses - Schedule of Past Due Loans (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
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Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | $ 36,400,643 | $ 32,991,927
Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 36,400,643 | 32,991,927
Commercial |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 10,408,095 | 9,512,230
Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 10,183,363 | 9,279,466
Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 16,356,216 | 14,140,629
Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 16,180,588 | 13,971,571
BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 400,360 | 401,822
Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,757,896 | 6,699,443
Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,757,896 | 6,699,443
Indirect |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,096,234 | 1,050,982
Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,096,234 | 1,050,982
Direct |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 419,201 | 523,172
Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 419,201 | 523,172
Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,363,001 | 1,065,471
Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,363,001 | 1,065,471
Total Past Due | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 195,856 | 133,465
Total Past Due | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 53,877 | 22,321
Total Past Due | Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 98,411 | 44,995
Total Past Due | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 2,456 | 2,479
Total Past Due | Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 9,046 | 27,974
Total Past Due | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 11,088 | 10,221
Total Past Due | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 4,661 | 8,678
Total Past Due | Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 16,317 | 16,797
30-59 Days Past Due | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 53,940 | 59,187
30-59 Days Past Due | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 11,690 | 16,128
30-59 Days Past Due | Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 20,125 | 9,081
30-59 Days Past Due | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,095 | 1,368
30-59 Days Past Due | Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 5,817 | 12,358
30-59 Days Past Due | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 7,702 | 7,025
30-59 Days Past Due | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 2,172 | 5,436
30-59 Days Past Due | Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 5,339 | 7,791
60-89 Days Past Due | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 52,256 | 12,743
60-89 Days Past Due | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,213 | 1,332
60-89 Days Past Due | Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 38,395 | 5,254
60-89 Days Past Due | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 0 | 134
60-89 Days Past Due | Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 740 | 367
60-89 Days Past Due | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 2,088 | 1,854
60-89 Days Past Due | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,029 | 1,455
60-89 Days Past Due | Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 3,791 | 2,347
Past Due 90 Days or More | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 89,660 | 61,535
Past Due 90 Days or More | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 35,974 | 4,861
Past Due 90 Days or More | Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 39,891 | 30,660
Past Due 90 Days or More | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,361 | 977
Past Due 90 Days or More | Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 2,489 | 15,249
Past Due 90 Days or More | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,298 | 1,342
Past Due 90 Days or More | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,460 | 1,787
Past Due 90 Days or More | Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 7,187 | 6,659
Current | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 36,204,787 | 32,858,462
Current | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 10,129,486 | 9,257,145
Current | Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 16,082,177 | 13,926,576
Current | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 397,904 | 399,343
Current | Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,748,850 | 6,671,469
Current | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,085,146 | 1,040,761
Current | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 414,540 | 514,494
Current | Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | $ 1,346,684 | $ 1,048,674

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