Goodwill, net (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
Goodwill
Gross goodwill, beginning balance		$ 411,634,000	$ 530,547,000
Goodwill, beginning balance		411,634,000	530,547,000
Goodwill, period increase (decrease)		29,363,000	(118,913,000)
Goodwill acquired during the period		32,317,000	18,972,000
Impairment charges	$ 0	0	(153,859,000)
Currency translation and other adjustments		(2,954,000)	15,974,000
Gross goodwill, ending balance	440,997,000	440,997,000	411,634,000
Goodwill, ending balance	440,997,000	440,997,000	411,634,000
Strategic Alternatives
Goodwill
Gross goodwill, beginning balance		90,480,000	232,429,000
Goodwill, beginning balance		90,480,000	232,429,000
Goodwill, period increase (decrease)		(1,454,000)	(141,949,000)
Goodwill acquired during the period		0	0
Impairment charges			(153,859,000)
Currency translation and other adjustments		(1,454,000)	11,910,000
Gross goodwill, ending balance	89,026,000	89,026,000	90,480,000
Goodwill, ending balance	89,026,000	89,026,000	90,480,000
Wealth Management
Goodwill
Gross goodwill, beginning balance		321,154,000	298,118,000
Goodwill, beginning balance		321,154,000	298,118,000
Goodwill, period increase (decrease)		30,817,000	23,036,000
Goodwill acquired during the period		32,317,000	18,972,000
Impairment charges			0
Currency translation and other adjustments		(1,500,000)	4,064,000
Gross goodwill, ending balance	351,971,000	351,971,000	321,154,000
Goodwill, ending balance	$ 351,971,000	$ 351,971,000	$ 321,154,000