Acquisitions - Summary of Allocation of Purchase Price (Parenthetical) (Details) - USD ($) $ in Thousands		1 Months Ended
	Nov. 01, 2021	Dec. 31, 2021
NEC Acquisition
Business Acquisition [Line Items]
Other intangible assets, net	$ 23,700
NEC Acquisition | Customer Relationship
Business Acquisition [Line Items]
Other intangible assets, net	$ 14,000
other intangible asset estimated useful life	6 years
NEC Acquisition | Investment Advisory Contracts
Business Acquisition [Line Items]
Other intangible assets, net	$ 9,700
other intangible asset estimated useful life	2 years
WestEnd Acquisition
Business Acquisition [Line Items]
Other intangible assets, net		$ 175,500
WestEnd Acquisition | Customer Relationship
Business Acquisition [Line Items]
Other intangible assets, net		$ 172,500
other intangible asset estimated useful life		10 years
WestEnd Acquisition | Trade Name
Business Acquisition [Line Items]
Other intangible assets, net		$ 3,000
other intangible asset estimated useful life		7 years