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