Business Combinations and Divestitures - Schedule of Purchase, Cash and Equity Considerations (Details) - USD ($) $ in Thousands					3 Months Ended
	Apr. 30, 2025	Jul. 01, 2024	May 09, 2024	Apr. 03, 2024	Mar. 31, 2025	Sep. 30, 2025	Dec. 31, 2024
Business Combination, Consideration Transferred [Abstract]
Contingent consideration						$ 50,745	$ 64,639
East End Advisors, LLC ("EEA")
Business Combination, Consideration Transferred [Abstract]
Cash consideration				$ 69,013
Contingent consideration installments				23,308
Payment of assumed liabilities				793
Contingent consideration				23,300		24,200	29,900
Total purchase consideration transferred				$ 93,114
Pointwise Partners Limited ("PW")
Business Combination, Consideration Transferred [Abstract]
Cash consideration			$ 1,735		$ 1,000
Payment of assumed liabilities			3,300
Equity consideration			1,705
Deferred consideration			3,328			$ 0	$ 3,339
Settlement of pre-existing relationships			1,186
Total purchase consideration transferred			$ 7,954
Envoi, LLC (“Envoi”)
Business Combination, Consideration Transferred [Abstract]
Cash consideration		$ 25,258
Earn-out consideration		9,000
Contingent consideration		9,000
Total purchase consideration transferred		$ 34,258
Kontora Family Office GmbH ("Kontora")
Business Combination, Consideration Transferred [Abstract]
Cash consideration	$ 8,740
Settlement of debt	1,213
Contingent consideration	5,743
Total purchase consideration transferred	$ 15,696