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Segment Reporting - Schedule of Financing Receivables by Segment (Details) $ in Thousands | Mar. 31, 2025 USD ($) employee | Dec. 31, 2024 USD ($) employee
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Loans, net of deferred fees and costs | $ 42,648,738 | $ 42,609,028
Deposits | $ 50,843,061 | $ 51,095,359
Full-time equivalent employees | employee | 4,720 | 4,696
Operating Segments | Wholesale Banking |  |
Segment Reporting Information [Line Items] |  |
Loans, net of deferred fees and costs | $ 24,766,893 | $ 24,677,119
Deposits | $ 14,864,688 | $ 15,207,166
Full-time equivalent employees | employee | 345 | 336
Operating Segments | Community Banking |  |
Segment Reporting Information [Line Items] |  |
Loans, net of deferred fees and costs | $ 7,909,624 | $ 7,921,182
Deposits | $ 10,980,833 | $ 10,877,394
Full-time equivalent employees | employee | 541 | 533
Operating Segments | Consumer Banking |  |
Segment Reporting Information [Line Items] |  |
Loans, net of deferred fees and costs | $ 2,719,333 | $ 2,776,305
Deposits | $ 18,206,523 | $ 18,365,142
Full-time equivalent employees | employee | 1,484 | 1,475
Operating Segments | Financial Management Services |  |
Segment Reporting Information [Line Items] |  |
Loans, net of deferred fees and costs | $ 5,241,567 | $ 5,263,474
Deposits | $ 1,190,175 | $ 1,109,270
Full-time equivalent employees | employee | 560 | 565
Treasury and Corporate Other |  |
Segment Reporting Information [Line Items] |  |
Loans, net of deferred fees and costs | $ 2,011,321 | $ 1,970,948
Deposits | $ 5,600,842 | $ 5,536,387
Full-time equivalent employees | employee | 1,790 | 1,787

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