Goodwill and Other Intangible Assets - Summary of Intangible Assets (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Intangible Assets [Line Items]
Definite-lived intangible assets, Accumulated amortization	$ (48,291)	$ (45,668)
Total	93,539
Intangible assets, Gross carrying amount	729,810	729,810
Intangible assets, Net carrying amount	681,519	684,142
Trade names
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross carrying amount	50,530	50,530
Definite-lived intangible assets, Accumulated amortization	(17,989)	(17,305)
Total	32,541	33,225
Technology
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross carrying amount	19,600	19,600
Definite-lived intangible assets, Accumulated amortization	(6,439)	(5,694)
Total	13,161	13,906
Customer relationships
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross carrying amount	36,450	36,450
Definite-lived intangible assets, Accumulated amortization	(10,572)	(9,846)
Total	25,878	26,604
Regulatory licenses
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross carrying amount	34,850	34,850
Definite-lived intangible assets, Accumulated amortization	(12,924)	(12,488)
Total	21,926	22,362
Non-compete agreements
Intangible Assets [Line Items]
Definite-lived intangible assets, Gross carrying amount	400	400
Definite-lived intangible assets, Accumulated amortization	(367)	(335)
Total	33	65
Broker-Dealer Relationships
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Net carrying amount	570,480	570,480
Enterprise Distribution Channel Customer Relationships
Intangible Assets [Line Items]
Indefinite-lived intangible assets, Net carrying amount	$ 17,500	$ 17,500