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Business Segment Information - Schedule Of Additional Information Pertaining To Business Segments (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | $ 56,566 | $ 59,143 | $ 72,834
Depreciation | 33,358 | 35,300 | 33,657
Amortization | 41,869 | 38,669 | 54,280
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | 55,338 | 57,759 | 71,120
Depreciation | 29,533 | 34,432 | 32,944
Amortization | 41,548 | 38,388 | 54,017
Operating Segments | Investment Managers |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | 25,115 | 26,603 | 20,931
Depreciation | 6,527 | 8,327 | 7,807
Amortization | 362 | 771 | 6,400
Operating Segments | Private Banks |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | 18,118 | 19,331 | 32,454
Depreciation | 11,129 | 21,887 | 21,237
Amortization | 20,514 | 19,094 | 25,886
Operating Segments | Investment Advisors |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | 8,332 | 9,329 | 13,027
Depreciation | 8,754 | 2,040 | 1,933
Amortization | 8,540 | 7,620 | 9,905
Operating Segments | Institutional Investors |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | 2,895 | 1,639 | 3,884
Depreciation | 2,411 | 1,207 | 1,142
Amortization | 7,576 | 7,324 | 8,166
Operating Segments | Investments in New Businesses |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | 878 | 857 | 824
Depreciation | 712 | 971 | 825
Amortization | 4,556 | 3,579 | 3,660
Corporate Overhead |  |  |
Segment Reporting Information [Line Items] |  |  |
Capital Expenditures | 1,228 | 1,384 | 1,714
Depreciation | 3,825 | 868 | 713
Amortization | $ 321 | $ 281 | $ 263

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