Consolidated Company-Sponsored Investment Funds - Fair Value (Details) - Recurring - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Variable Interest Entity [Line Items]
Derivatives	$ 24,712	$ 15,422
Derivatives	13,712	16,923
Total liabilities measured at fair value	261,021	59,011
Consolidated company-sponsored investment funds
Variable Interest Entity [Line Items]
Investments	516,536	613,025
Derivatives	7,552	5,887
Total assets measured at fair value	524,088	618,912
Derivatives	21,540	18,342
Total liabilities measured at fair value	21,540	18,342
Level 1
Variable Interest Entity [Line Items]
Investments	136,344	155,904
Derivatives	1,768	392
Total assets measured at fair value	233,633	307,452
Derivatives	162	1,186
Total liabilities measured at fair value	162	5,014
Level 1 | Consolidated company-sponsored investment funds
Variable Interest Entity [Line Items]
Investments	129,706	165,415
Derivatives	1,529	622
Total assets measured at fair value	131,235	166,037
Derivatives	14,932	16,291
Total liabilities measured at fair value	14,932	16,291
Level 2
Variable Interest Entity [Line Items]
Investments	27,799	39,284
Derivatives	22,944	15,030
Total assets measured at fair value	1,572,448	1,558,142
Derivatives	13,550	15,737
Total liabilities measured at fair value	13,550	15,737
Level 2 | Consolidated company-sponsored investment funds
Variable Interest Entity [Line Items]
Investments	386,830	444,253
Derivatives	6,023	5,265
Total assets measured at fair value	392,853	449,518
Derivatives	6,608	2,051
Total liabilities measured at fair value	6,608	2,051
Level 3
Variable Interest Entity [Line Items]
Investments	129	126
Derivatives	0	0
Total assets measured at fair value	129	126
Derivatives	0	0
Total liabilities measured at fair value	247,309	38,260
Level 3 | Consolidated company-sponsored investment funds
Variable Interest Entity [Line Items]
Investments	0	3,357
Derivatives	0	0
Total assets measured at fair value	0	3,357
Derivatives	0	0
Total liabilities measured at fair value	$ 0	$ 0