Fair Value Disclosures - Schedule of Assets and Liabilities Measured At Fair Value (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Assets:
Investments at fair value	$ 152,254	$ 148,674
Liabilities:
Preferred stock tranche liability	1,650	3,940
Earn-out liabilities	50,745	64,639
TRA liability	10,767	9,378
Earn-in consideration payable	0	932
Mutual funds
Assets:
Investments at fair value	42	105
Exchange-traded funds and BDC funds
Assets:
Investments at fair value	34	112
Fair value, recurring
Assets:
Contingent consideration receivable	0	0
Other	56
Total	152,254	148,674
Liabilities:
Preferred stock tranche liability	1,650	3,940
Earn-out liabilities	50,745	64,639
TRA liability	10,767	9,378
Earn-in consideration payable		932
Total	63,162	78,889
Fair value, recurring | Mutual funds
Assets:
Investments at fair value	42	105
Fair value, recurring | Exchange-traded funds and BDC funds
Assets:
Investments at fair value	34	118
Fair value, recurring | Investments – External Strategic Managers
Assets:
Investments at fair value	149,867	147,568
Fair value, recurring | Investments – Affiliated Funds
Assets:
Investments at fair value	$ 2,255	$ 883
Liabilities:
Redemption, required notice (in days)	30 days	30 days
Level 1 | Fair value, recurring
Assets:
Contingent consideration receivable	$ 0	$ 0
Other	6
Total	82	223
Liabilities:
Preferred stock tranche liability	0	0
Earn-out liabilities	0	0
TRA liability	0	0
Earn-in consideration payable		932
Total	0	932
Level 1 | Fair value, recurring | Mutual funds
Assets:
Investments at fair value	42	105
Level 1 | Fair value, recurring | Exchange-traded funds and BDC funds
Assets:
Investments at fair value	34	118
Level 1 | Fair value, recurring | Investments – External Strategic Managers
Assets:
Investments at fair value	0	0
Level 1 | Fair value, recurring | Investments – Affiliated Funds
Assets:
Investments at fair value	0	0
Level 2 | Fair value, recurring
Assets:
Contingent consideration receivable	0	0
Other	50
Total	50	0
Liabilities:
Preferred stock tranche liability	0	0
Earn-out liabilities	0	0
TRA liability	0	0
Earn-in consideration payable		0
Total	0	0
Level 2 | Fair value, recurring | Mutual funds
Assets:
Investments at fair value	0	0
Level 2 | Fair value, recurring | Exchange-traded funds and BDC funds
Assets:
Investments at fair value	0	0
Level 2 | Fair value, recurring | Investments – External Strategic Managers
Assets:
Investments at fair value	0	0
Level 2 | Fair value, recurring | Investments – Affiliated Funds
Assets:
Investments at fair value	0	0
Level 3
Liabilities:
Preferred stock tranche liability	1,650	3,940
TRA liability	10,767	9,378
Level 3 | Investments – External Strategic Managers
Assets:
Investments at fair value	149,867	147,568
Level 3 | Fair value, recurring
Assets:
Contingent consideration receivable	0	0
Other	0
Total	149,867	147,568
Liabilities:
Preferred stock tranche liability	1,650	3,940
Earn-out liabilities	50,745	64,639
TRA liability	10,767	9,378
Earn-in consideration payable		0
Total	63,162	77,957
Level 3 | Fair value, recurring | Mutual funds
Assets:
Investments at fair value	0	0
Level 3 | Fair value, recurring | Exchange-traded funds and BDC funds
Assets:
Investments at fair value	0	0
Level 3 | Fair value, recurring | Investments – External Strategic Managers
Assets:
Investments at fair value	149,867	147,568
Level 3 | Fair value, recurring | Investments – Affiliated Funds
Assets:
Investments at fair value	$ 0	$ 0