Acquisitions - Acquisition of The Investment Center, Inc. (“The Investment Center”) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Fair value of consideration transferred
Contingent consideration		$ 124,038	$ 124,038	$ 196,898
Goodwill, Measurement Period Adjustment			26,035	16,980
Goodwill		2,644,723	2,644,723	$ 2,172,873	$ 1,856,648
The Investment Center, Inc.
Fair value of consideration transferred
Total consideration	$ 72,600
Cash	72,200
Business Combination, Consideration Transferred, Liabilities Incurred	400
Contingent consideration	$ 10,400
Business Combination, Acquisition Related Costs			6,000
Business Combination, Increase In Consideration Transferred			2,000
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment Other Liabilties		6,100
Goodwill, Measurement Period Adjustment		3,700
Goodwill		29,100	29,100
The Investment Center, Inc. | Advisory Relationships
Fair value of consideration transferred
Increase to provisional intangible assets acquired		400
The Investment Center, Inc. | Advisor Relationships
Fair value of consideration transferred
Finite-lived intangible assets acquired		$ 43,500	$ 43,500
Weighted-Average Life  Remaining (in years)			16 years