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Loans and Allowance for Credit Losses - Schedule of Past Due Loans (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | $ 32,991,927 | $ 31,123,641
Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 32,991,927 | 31,123,641
Commercial |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 9,512,230 | 9,508,904
Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 9,279,466 | 9,298,624
Commercial real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 14,140,629 | 12,457,070
Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 13,971,571 | 12,298,748
BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 401,822 | 368,602
Residential real estate |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,699,443 | 6,460,441
Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,699,443 | 6,460,441
Indirect |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,050,982 | 1,034,257
Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,050,982 | 1,034,257
Direct |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 523,172 | 629,186
Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 523,172 | 629,186
Home equity |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,065,471 | 1,033,783
Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,065,471 | 1,033,783
Total Past Due | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 133,465 | 186,223
Total Past Due | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 22,321 | 30,028
Total Past Due | Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 44,995 | 81,444
Total Past Due | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 2,479 | 1,698
Total Past Due | Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 27,974 | 40,967
Total Past Due | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 10,221 | 9,378
Total Past Due | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 8,678 | 9,450
Total Past Due | Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 16,797 | 13,258
30-59 Days Past Due | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 59,187 | 104,589
30-59 Days Past Due | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 16,128 | 14,147
30-59 Days Past Due | Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 9,081 | 47,240
30-59 Days Past Due | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,368 | 730
30-59 Days Past Due | Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 12,358 | 24,181
30-59 Days Past Due | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 7,025 | 6,302
30-59 Days Past Due | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 5,436 | 5,404
30-59 Days Past Due | Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 7,791 | 6,585
60-89 Days Past Due | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 12,743 | 17,713
60-89 Days Past Due | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,332 | 4,801
60-89 Days Past Due | Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 5,254 | 1,312
60-89 Days Past Due | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 134 | 365
60-89 Days Past Due | Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 367 | 5,033
60-89 Days Past Due | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,854 | 2,118
60-89 Days Past Due | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,455 | 2,118
60-89 Days Past Due | Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 2,347 | 1,966
Past Due 90 Days or More | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 61,535 | 63,921
Past Due 90 Days or More | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 4,861 | 11,080
Past Due 90 Days or More | Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 30,660 | 32,892
Past Due 90 Days or More | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 977 | 603
Past Due 90 Days or More | Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 15,249 | 11,753
Past Due 90 Days or More | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,342 | 958
Past Due 90 Days or More | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,787 | 1,928
Past Due 90 Days or More | Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,659 | 4,707
Current | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 32,858,462 | 30,937,418
Current | Commercial | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 9,257,145 | 9,268,596
Current | Commercial real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 13,926,576 | 12,217,304
Current | BBCC | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 399,343 | 366,904
Current | Residential real estate | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 6,671,469 | 6,419,474
Current | Indirect | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 1,040,761 | 1,024,879
Current | Direct | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | 514,494 | 619,736
Current | Home equity | Portfolio Segment After Reclassifications |  |
Financing Receivable, Recorded Investment, Past Due [Line Items] |  |
Total loans, net of unearned income | $ 1,048,674 | $ 1,020,525

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