Borrowings - Revolving Credit Facility (Details) € in Thousands, £ in Thousands, $ in Thousands			3 Months Ended				6 Months Ended
	Jul. 24, 2024 USD ($)	Oct. 20, 2023 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 AUD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2024 AUD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2025 AUD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2024 AUD ($)	Jun. 30, 2025 AUD ($)	Jun. 30, 2025 GBP (£)	Jun. 30, 2025 EUR (€)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 AUD ($)	Dec. 31, 2024 GBP (£)	Dec. 31, 2024 EUR (€)
Line of Credit Facility [Line Items]
Debt			$ 2,743,571,000				$ 2,743,571,000							$ 2,151,713,000
Unrealized gain (loss) on foreign currency and other transactions			(7,269,000)		$ (346,000)		(10,026,000)		$ 293,000
Net assets			2,546,266,000		$ 1,705,478,000		2,546,266,000		$ 1,705,478,000
Interest expense - Revolving Credit Facility | Revolving Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 295,000,000	707,500,000				707,500,000
Accordion feature, total facility amount		$ 800,000,000
Debt			$ 519,700,000				$ 519,700,000							$ 396,100,000
Unrealized gain (loss) on foreign currency and other transactions				$ (7,287)		$ (346)		$ (10,047)		$ 295
Weighted average interest rate			6.50%				6.50%				6.50%	6.50%	6.50%	7.00%	7.00%	7.00%	7.00%
Revolving credit facility maximum borrowing capacity percentage		72.50%
Net assets	$ 500,000,000	$ 500,000,000
Amount equal to net assets	$ 660,865,000	$ 1,063,400,000
Percentage equal to net assets	65.00%	65.00%
Ratio of total assets to total liabilities		1.5
Senior debt coverage ratio		2
Minimum net worth equal required		$ 500,000,000
Distributions in cash or property other than common stock percentage		1.15
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Interest rate in case of any U.S. dollar advances | Alternate base rate
Line of Credit Facility [Line Items]
Interest rate, basis spread		1.25%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Interest rate in case of any U.S. dollar advances | Adjusted Term SOFR
Line of Credit Facility [Line Items]
Interest rate, basis spread		2.25%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Interest rate in case of any U.S. dollar advances | Applicable benchmark rate
Line of Credit Facility [Line Items]
Interest rate, basis spread		2.25%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Interest rate in case of any U.S. dollar advances | Daily Simple RFR
Line of Credit Facility [Line Items]
Interest rate, basis spread		2.50%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Interest rate in case of any U.S. dollar advances at any time the Rating Condition is satisfied | Alternate base rate
Line of Credit Facility [Line Items]
Interest rate, basis spread		1.15%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Interest rate in case of any U.S. dollar advances at any time the Rating Condition is satisfied | Adjusted Term SOFR
Line of Credit Facility [Line Items]
Interest rate, basis spread		2.15%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Interest rate in case of any U.S. dollar advances at any time the Rating Condition is satisfied | Applicable benchmark rate
Line of Credit Facility [Line Items]
Interest rate, basis spread		2.15%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Interest rate in case of any U.S. dollar advances at any time the Rating Condition is satisfied | Daily Simple RFR
Line of Credit Facility [Line Items]
Interest rate, basis spread		2.35%
Revolving Credit Facility With Australian Dollar Denominated Borrowings | Revolving Credit Agreement
Line of Credit Facility [Line Items]
Debt			$ 26,329,000				$ 26,329,000				$ 40,000			$ 13,599,000	$ 21,978
Revolving Credit Facility With British Pound Denominated Borrowings | Revolving Credit Agreement
Line of Credit Facility [Line Items]
Debt			54,928,000				54,928,000					£ 40,000		48,111,000		£ 38,440
Revolving Credit Facility With Euros Denominated Borrowings | Revolving Credit Agreement
Line of Credit Facility [Line Items]
Debt			$ 28,583,000				$ 28,583,000						€ 24,250	$ 23,296,000			€ 22,500