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Acquisitions - Pro Forma Information (Details) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2025 | Dec. 31, 2024
Commonwealth Financial Network. Acquisition |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Business Acquisition, Pro Forma Revenue | $ 18,634,628 | $ 15,073,569
Business Acquisition, Pro Forma Net Income (Loss) | $ 1,330,159 | 536,737
Atria Wealth Solutions, Inc. Acquisition |  |
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items] |  |
Business Acquisition, Pro Forma Revenue |  | 12,998,942
Business Acquisition, Pro Forma Net Income (Loss) |  | $ 982,067

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