Investments - Schedule of Certain Investments (Details) - USD ($) shares in Thousands, $ in Thousands	6 Months Ended
	Jun. 30, 2026	Dec. 31, 2025
Net Investment Income [Line Items]
Investments in Two Sigma Funds, at fair value	$ 1,844,158	$ 1,587,658
TS Hamilton Fund
Net Investment Income [Line Items]
Investments in Two Sigma Funds, at fair value	$ 1,844,158	$ 1,587,658
State Street Treasury Obligations Money Market Fund \| TS Hamilton Fund \| Long
Net Investment Income [Line Items]
Principal / Shares	157,162
Investments in Two Sigma Funds, at fair value	$ 157,162
State Street Treasury Obligations Money Market Fund \| Members' Equity \| Investment Concentration Risk \| TS Hamilton Fund \| Long
Net Investment Income [Line Items]
% of Members' Equity	6.40%
U.S. Treasury Securities, 0.0000% - 5.0000%, due 7/9/2026 - 5/15/2056 \| TS Hamilton Fund \| Long
Net Investment Income [Line Items]
Principal / Shares	2,088,572
Investments in Two Sigma Funds, at fair value	$ 2,054,490
U.S. Treasury Securities, 0.0000% - 5.0000%, due 7/9/2026 - 5/15/2056 \| Members' Equity \| Investment Concentration Risk \| TS Hamilton Fund \| Long
Net Investment Income [Line Items]
% of Members' Equity	83.80%
U.S. Treasury Securities, 1.2500% - 5.0000%, due 1/31/2027 - 2/15/2056 \| TS Hamilton Fund \| Short
Net Investment Income [Line Items]
Principal / Shares	230,397
Investments in Two Sigma Funds, at fair value	$ 227,862
U.S. Treasury Securities, 1.2500% - 5.0000%, due 1/31/2027 - 2/15/2056 \| Members' Equity \| Investment Concentration Risk \| TS Hamilton Fund \| Short
Net Investment Income [Line Items]
% of Members' Equity	9.30%