Business Segment Information - Schedule Of Additional Information Pertaining To Business Segments (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Capital expenditure	$ 12,138	$ 14,888	$ 45,617	$ 49,698
Depreciation	8,341	9,197	25,097	26,509
Amortization	10,413	9,797	31,284	28,851
Operating Segments
Segment Reporting Information [Line Items]
Capital expenditure	11,916	14,581	44,588	48,414
Depreciation	7,333	8,950	22,199	25,852
Amortization	10,343	9,723	31,027	28,651
Operating Segments \| Private Banks
Segment Reporting Information [Line Items]
Capital expenditure	2,764	7,580	13,782	24,652
Depreciation	2,620	5,565	8,356	16,370
Amortization	5,147	4,852	15,347	14,216
Operating Segments \| Investment Advisors
Segment Reporting Information [Line Items]
Capital expenditure	1,092	3,545	6,244	11,499
Depreciation	2,254	540	6,625	1,557
Amortization	2,169	1,933	6,439	5,698
Operating Segments \| Institutional Investors
Segment Reporting Information [Line Items]
Capital expenditure	740	390	2,589	1,495
Depreciation	614	338	1,816	922
Amortization	1,851	1,834	5,619	5,486
Operating Segments \| Investment Managers
Segment Reporting Information [Line Items]
Capital expenditure	7,196	2,804	21,260	9,962
Depreciation	1,659	2,227	4,874	6,268
Amortization	80	209	161	566
Operating Segments \| Investments In New Businesses
Segment Reporting Information [Line Items]
Capital expenditure	124	262	713	806
Depreciation	186	280	528	735
Amortization	1,096	895	3,461	2,685
Corporate overhead
Segment Reporting Information [Line Items]
Capital expenditure	222	307	1,029	1,284
Depreciation	1,008	247	2,898	657
Amortization	$ 70	$ 74	$ 257	$ 200

The aggregate amount of recurring noncash expense charged against earnings in the period to allocate the cost of assets over their estimated remaining economic lives.

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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-Name Accounting Standards Codification
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The expense recognized in the current period that allocates the cost of nonproduction tangible assets over their useful lives.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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