Related Party Transactions -Summary of Related Party Transactions (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Related party assets
Cash and cash equivalents	$ 38,171	$ 69,533
Receivables (investment management fees)	68,347	80,634
Receivables (fund administration and distribution fees)	14,379	17,123
Related party revenue
Total revenue	854,800	890,265	$ 775,351
Investment Management Fees
Related party revenue
Total revenue	664,710	674,539	562,036
Fund Administration and Distribution Fees
Related party revenue
Total revenue	190,090	215,726	213,315
VCH
Related party assets
Cash and cash equivalents	24,575	0
Receivables (investment management fees)	44,218	53,256
Receivables (fund administration and distribution fees)	14,379	17,123
Prepaid expenses	1,097	304
Investments (investments in proprietary funds, fair value)	466	912
Investments (deferred compensation plan investments, fair value)	24,852	28,643
Total	109,587	100,238
Related party liabilities
Accounts payable and accrued expenses (fund reimbursements)	5,838	6,695
Related party revenue
Total revenue	700,990	782,501	684,468
Related party expense
General and administrative	415	521	702
Related party other income (expense)
Interest income (expense) and other income (expense)	2,199	5,470	2,337
VCH | Investment Management Fees
Related party revenue
Total revenue	510,900	566,775	471,153
VCH | Fund Administration and Distribution Fees
Related party revenue
Total revenue	$ 190,090	$ 215,726	$ 213,315