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Goodwill and Intangible Assets (Schedule of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Beginning balance	$ 115,599	$ 117,232
Measurement period adjustments		(1,588)
Acquisitions	21,452
Foreign currency translation adjustments	282	(45)
Ending balance	137,333	115,599
Institutional Investors
Goodwill [Roll Forward]
Beginning balance	47,108	48,911
Measurement period adjustments		(1,803)
Acquisitions	14,492
Foreign currency translation adjustments	284	0
Ending balance	61,884	47,108
Investment Managers
Goodwill [Roll Forward]
Beginning balance	56,992	56,822
Measurement period adjustments		215
Acquisitions	0
Foreign currency translation adjustments	(2)	(45)
Ending balance	56,990	56,992
Investments in New Businesses
Goodwill [Roll Forward]
Beginning balance	11,499	11,499
Measurement period adjustments
Acquisitions	6,960
Foreign currency translation adjustments	0	0
Ending balance	$ 18,459	$ 11,499

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