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Acquisitions and Joint Ventures - Narrative (Details) - USD ($) $ in Thousands |  |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Jan. 24, 2024 | Jan. 11, 2023 | Mar. 31, 2024 | Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  |  |  | $ 2,868,068 | $ 2,631,465 | $ 2,514,104
Professional and outside services |  |  |  | $ 58,253 | $ 107,497 | $ 117,530
Ametros |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | $ 228,185 |  |  |  |  |
Professional and outside services |  |  | $ 3,100 |  |  |
Equity interests acquired | 99.40% |  |  |  |  |
Cash consideration | $ 359,700 |  |  |  |  |
Ametros | Core Deposits |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets | $ 182,800 |  |  |  |  |
Acquired intangible assets, useful life | 25 years |  |  |  |  |
Ametros | Trade Names |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets | $ 6,100 |  |  |  |  |
Acquired intangible assets, useful life | 5 years |  |  |  |  |
interLINK |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill |  | $ 143,200 |  |  |  |
Equity interests acquired |  | 100.00% |  |  |  |
Deposits made by acquired company |  | $ 9,000,000 |  |  |  |
Purchase price |  | 174,600 |  |  |  |
Cash consideration |  | 158,600 |  |  |  |
Contingent consideration |  | 16,000 |  |  |  |
Net assets measured at fair value |  | 31,400 |  |  |  |
Royal liabilities |  | 15,900 |  |  |  |
interLINK | Broker Dealer Relationship |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets |  | 36,000 |  |  |  |
interLINK | Developed Technology Rights |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets acquired |  | 6,000 |  |  |  |
interLINK | Non Competition Agreement |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Intangible assets |  | $ 4,000 |  |  |  |

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