Fair Value Measurement and Disclosures - Summary of Fair Value of Level III Investments (Details) - USD ($)	3 Months Ended	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2025
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	$ (1,581,000)	$ 736,000
Transfers into Level III	140,478,000	140,478,000
Transfers out of Level III	0	(94,000)
Level III
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning	356,705,000	73,377,000
Purchases	340,774,000	729,101,000
Sales	(66,246,000)	(173,469,000)
Net realized gain (loss)	4,448,000	4,449,000
Net change in unrealized gain (loss)	(1,581,000)	736,000
Transfers into Level III	140,478,000	140,478,000
Transfers out of Level III		(94,000)
Balance, ending	774,578,000	774,578,000
Series I
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(1,237,000)	(2,359,000)
Transfers into Level III	34,264,000	34,264,000
Transfers out of Level III		(27,000)
Series I | Level III
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning	87,006,000	21,331,000
Purchases	59,072,000	151,928,000
Sales	(10,426,000)	(36,457,000)
Net realized gain (loss)	51,000	50,000
Net change in unrealized gain (loss)	(1,237,000)	(2,359,000)
Transfers into Level III	34,264,000	34,264,000
Transfers out of Level III		(27,000)
Balance, ending	168,730,000	168,730,000
Series II
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Net change in unrealized gain (loss)	(344,000)	3,095,000
Transfers into Level III	106,214,000	106,214,000
Transfers out of Level III		(67,000)
Series II | Level III
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Balance, beginning	269,699,000	52,046,000
Purchases	281,702,000	577,173,000
Sales	(55,820,000)	(137,012,000)
Net realized gain (loss)	4,397,000	4,399,000
Net change in unrealized gain (loss)	(344,000)	3,095,000
Transfers into Level III	106,214,000	106,214,000
Transfers out of Level III		(67,000)
Balance, ending	$ 605,848,000	$ 605,848,000