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Loans and Allowance for Credit Losses - Schedule of Types of Collateral (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | $ 33,623,319 | $ 32,991,927
Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 248,369 | 226,996
Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 40,959 | 25,524
Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 6,868 | 3,747
Auto |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 16,654 | 5,243
Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 6,398 | 6,464
Commercial |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 9,648,269 | 9,512,230
Commercial | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 11,284 | 14,303
Commercial | Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 39,258 | 24,729
Commercial | Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 5,728 | 2,577
Commercial | Auto |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 11,582 | 280
Commercial | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 319 | 328
Commercial real estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 14,653,958 | 14,140,629
Commercial real estate | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 163,753 | 146,425
Commercial real estate | Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Commercial real estate | Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 1,133 | 1,167
Commercial real estate | Auto |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Commercial real estate | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 6,031 | 6,107
BBCC | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 3,793 | 3,522
BBCC | Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 1,701 | 794
BBCC | Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
BBCC | Auto |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 278 | 390
BBCC | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Residential real estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 6,661,379 | 6,699,443
Residential real estate | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 47,022 | 41,771
Residential real estate | Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Residential real estate | Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Residential real estate | Auto |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Residential real estate | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Indirect |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 1,091,998 | 1,050,982
Indirect | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Indirect | Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Indirect | Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Indirect | Auto |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 4,408 | 4,207
Indirect | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Direct |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 506,305 | 523,172
Direct | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 4,559 | 4,727
Direct | Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 1
Direct | Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 7 | 3
Direct | Auto |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 386 | 366
Direct | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 48 | 29
Home equity |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 1,061,410 | 1,065,471
Home equity | Real Estate |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 17,958 | 16,248
Home equity | Blanket Lien |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Home equity | Investment Securities/Cash |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Home equity | Auto |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | 0 | 0
Home equity | Other |  |
Financing Receivable, Allowance for Credit Losses [Line Items] |  |
Total loans, net of unearned income | $ 0 | $ 0

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