Borrowings - Revolving Credit Facility (Details) £ in Thousands, $ in Thousands		3 Months Ended				6 Months Ended
	Oct. 20, 2023 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2024 AUD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 AUD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2024 AUD ($)	Jun. 30, 2023 USD ($)	Jun. 30, 2023 AUD ($)	Jun. 30, 2024 AUD ($)	Jun. 30, 2024 GBP (£)	Jun. 27, 2024 USD ($)	Mar. 18, 2024 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2023 AUD ($)	Dec. 31, 2023 GBP (£)	Dec. 22, 2023 USD ($)
Line of Credit Facility [Line Items]
Debt		$ 1,776,397,000				$ 1,776,397,000								$ 1,247,946,000
Unrealized gain (loss) on foreign currency and other transactions		(346,000)		$ 1,000		293,000		$ 0
Net assets		1,705,478,000		$ 944,093,000		1,705,478,000		$ 944,093,000						1,302,667,000
Interest expense - Revolving Credit Facility
Line of Credit Facility [Line Items]
Debt		349,800,000				349,800,000								256,808,000
Interest expense - Revolving Credit Facility | Revolving Credit Agreement
Line of Credit Facility [Line Items]
Maximum borrowing capacity	$ 295,000,000											$ 385,000,000	$ 350,000,000				$ 325,000,000
Accordion feature, total facility amount	$ 450,000,000
Debt		$ 301,000,000				$ 301,000,000								$ 240,800,000
Unrealized gain (loss) on foreign currency and other transactions			$ 346		$ 0		$ 295		$ 0
Weighted average interest rate		7.90%				7.90%				7.90%	7.90%			7.90%	7.90%	7.90%
Revolving credit facility maximum borrowing capacity percentage	72.50%
Net assets	$ 500,000,000
Amount equal to net assets	$ 660,865,000
Percentage equal to net assets	65.00%
Ratio of total assets to total liabilities	1.5
Senior debt coverage ratio	2
Minimum net worth equal required	$ 215,000,000
Distributions in cash or property other than common stock percentage	1.15
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Alternate base rate | Interest rate in case of any U.S. dollar advances
Line of Credit Facility [Line Items]
Interest rate, basis spread	1.50%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Alternate base rate | Interest rate in case of any U.S. dollar advances at any time the Rating Condition is satisfied
Line of Credit Facility [Line Items]
Interest rate, basis spread	1.35%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Adjusted Term SOFR | Interest rate in case of any U.S. dollar advances
Line of Credit Facility [Line Items]
Interest rate, basis spread	2.50%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Adjusted Term SOFR | Interest rate in case of any U.S. dollar advances at any time the Rating Condition is satisfied
Line of Credit Facility [Line Items]
Interest rate, basis spread	2.35%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Applicable benchmark rate | Interest rate in case of any U.S. dollar advances
Line of Credit Facility [Line Items]
Interest rate, basis spread	2.50%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Applicable benchmark rate | Interest rate in case of any U.S. dollar advances at any time the Rating Condition is satisfied
Line of Credit Facility [Line Items]
Interest rate, basis spread	2.35%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Daily Simple RFR | Interest rate in case of any U.S. dollar advances
Line of Credit Facility [Line Items]
Interest rate, basis spread	2.50%
Interest expense - Revolving Credit Facility | Revolving Credit Agreement | Daily Simple RFR | Interest rate in case of any U.S. dollar advances at any time the Rating Condition is satisfied
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		$ 14,659,000				$ 14,659,000				$ 21,978				$ 16,008,000	$ 23,500
Revolving Credit Facility With British Pound Denominated Borrowings | Revolving Credit Agreement
Line of Credit Facility [Line Items]
Debt		$ 34,141,000				$ 34,141,000					£ 27,000					£ 0