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Loans and Allowance for Credit Losses - Schedule of Past Due Loans (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
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Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | $ 36,150,513 | $ 32,991,927
Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 36,150,513 | 32,991,927
Commercial |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 10,332,631 | 9,512,230
Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 10,102,227 | 9,279,466
Commercial real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 16,016,958 | 14,140,629
Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 15,841,344 | 13,971,571
BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 406,018 | 401,822
Residential real estate |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,894,957 | 6,699,443
Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,894,957 | 6,699,443
Indirect |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,101,585 | 1,050,982
Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,101,585 | 1,050,982
Direct |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 429,426 | 523,172
Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 429,426 | 523,172
Home equity |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,374,956 | 1,065,471
Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,374,956 | 1,065,471
Total Past Due | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 172,147 | 133,465
Total Past Due | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 37,372 | 22,321
Total Past Due | Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 66,610 | 44,995
Total Past Due | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 3,683 | 2,479
Total Past Due | Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 30,427 | 27,974
Total Past Due | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 9,324 | 10,221
Total Past Due | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 9,157 | 8,678
Total Past Due | Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 15,574 | 16,797
30-59 Days Past Due | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 52,654 | 59,187
30-59 Days Past Due | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 14,191 | 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 | 9,442 | 9,081
30-59 Days Past Due | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 2,155 | 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 | 10,558 | 12,358
30-59 Days Past Due | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,550 | 7,025
30-59 Days Past Due | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 4,578 | 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 | 5,180 | 7,791
60-89 Days Past Due | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 31,340 | 12,743
60-89 Days Past Due | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,151 | 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 | 16,022 | 5,254
60-89 Days Past Due | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 54 | 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 | 3,189 | 367
60-89 Days Past Due | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,928 | 1,854
60-89 Days Past Due | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,341 | 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 | 2,655 | 2,347
Past Due 90 Days or More | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 88,153 | 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 | 17,030 | 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 | 41,146 | 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 | 1,474 | 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 | 16,680 | 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 | 846 | 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 | 3,238 | 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 | 7,739 | 6,659
Current | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 35,978,366 | 32,858,462
Current | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 10,064,855 | 9,257,145
Current | Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 15,774,734 | 13,926,576
Current | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 402,335 | 399,343
Current | Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,864,530 | 6,671,469
Current | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,092,261 | 1,040,761
Current | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | 420,269 | 514,494
Current | Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Past Due [Line Items] |  |
Total loans, net of unearned income | $ 1,359,382 | $ 1,048,674

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