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Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

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Debt - Schedule of Outstanding Debt Obligations (Details) - USD ($)	Sep. 30, 2026	Jun. 25, 2026	Jun. 24, 2026	Feb. 17, 2026	Dec. 31, 2025	Nov. 15, 2023
Debt Instrument [Line Items]
Total Debt	$ 275,000,000				$ 950,000,000
Outstanding Principal	128,500,000				676,598,000
Unused Portion	146,500,000				273,402,000
Amount available	102,161,000				272,667,000
Unamortized Debt Issuance Costs	(2,795,000)				(7,791,000)
Net Carrying Value	125,705,000				668,807,000
Line of Credit \| Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Aggregate Principal Committed	75,000,000			$ 75,000,000.0	225,000,000
Outstanding Principal	0				11,598,000
Unused Portion	75,000,000				213,402,000
Amount available	75,000,000				213,402,000
Unamortized Debt Issuance Costs	(1,203,000)				(2,314,000)
Net Carrying Value					9,284,000
Line of Credit \| SPV Asset Facility I
Debt Instrument [Line Items]
Aggregate Principal Committed	200,000,000	$ 200,000,000.0	$ 375,000,000.0		375,000,000
Outstanding Principal	128,500,000				315,000,000
Unused Portion	71,500,000				60,000,000
Amount available	27,161,000				59,265,000
Unamortized Debt Issuance Costs	(1,592,000)				(3,327,000)
Net Carrying Value	126,908,000				311,673,000
Unsecured debt investments \| 2026 Notes
Debt Instrument [Line Items]
Initial amount					350,000,000	$ 350,000,000.0
Outstanding Principal					350,000,000
Unamortized Debt Issuance Costs	$ 0				(2,150,000)
Net Carrying Value					$ 347,850,000