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Business Segment Information - Schedule Of Additional Information Pertaining To Business Segments (Details) - USD ($) $ in Thousands | 3 Months Ended
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Mar. 31, 2025 | Mar. 31, 2024
Segment Reporting Information [Line Items] |  |
Capital Expenditures | $ 16,028 | $ 19,349
Depreciation | 7,927 | 8,389
Amortization | 10,710 | 10,386
Operating Segments |  |
Segment Reporting Information [Line Items] |  |
Capital Expenditures | 15,663 | 18,807
Depreciation | 4,743 | 7,440
Amortization | 10,646 | 10,307
Operating Segments | Investment Managers |  |
Segment Reporting Information [Line Items] |  |
Capital Expenditures | 6,486 | 7,675
Depreciation | 62 | 1,579
Amortization | 202 | 0
Operating Segments | Private Banks |  |
Segment Reporting Information [Line Items] |  |
Capital Expenditures | 5,503 | 6,432
Depreciation | 2,259 | 2,904
Amortization | 5,275 | 5,111
Operating Segments | Investment Advisors |  |
Segment Reporting Information [Line Items] |  |
Capital Expenditures | 2,632 | 3,165
Depreciation | 2,025 | 2,181
Amortization | 2,419 | 2,122
Operating Segments | Institutional Investors |  |
Segment Reporting Information [Line Items] |  |
Capital Expenditures | 763 | 1,119
Depreciation | 319 | 604
Amortization | 1,875 | 1,892
Operating Segments | Investments In New Businesses |  |
Segment Reporting Information [Line Items] |  |
Capital Expenditures | 279 | 416
Depreciation | 78 | 172
Amortization | 875 | 1,182
Corporate overhead |  |
Segment Reporting Information [Line Items] |  |
Capital Expenditures | 365 | 542
Depreciation | 3,184 | 949
Amortization | $ 64 | $ 79

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