Summary of Significant Accounting Policies - Narrative (Details) € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 AUD ($)	Jun. 30, 2025 CAD ($)	Jun. 30, 2025 EUR (€)	Jun. 30, 2025 GBP (£)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 EUR (€)	Dec. 31, 2024 GBP (£)
Restricted Cash and Cash Equivalent Item [Line Items]
Minimum term prior to record date fixed by board under dividend reinvestment plan			10 days
Unamortized deferred financing costs	$ 21,932		$ 21,932						$ 23,351
Amortization of debt issuance costs	2,289	$ 2,226	$ 5,142	$ 4,225
Excise tax accrued (in percent)			90.00%
Net ordinary income of deferrals and elections (in percent)			98.00%
Excess of capital gains (in percent)			98.20%
Nondeductible U.S. federal excise tax			4.00%
Net expense (benefit) for U.S. federal excise tax	8	245	$ 383	370
Payables for excise taxes	333		333						1,050
U.S. federal and state corporate-level income taxes, net tax expense	28	$ 104	28	$ 104
U.S. federal and state corporate-level income taxes, payables	0		0						0
Australia, Dollars
Restricted Cash and Cash Equivalent Item [Line Items]
Cash	395		395		$ 600
Canada, Dollars
Restricted Cash and Cash Equivalent Item [Line Items]
Cash	68		68			$ 92
Euro Member Countries, Euro
Restricted Cash and Cash Equivalent Item [Line Items]
Cash	67		67				€ 57		14	€ 14
United Kingdom, Pounds
Restricted Cash and Cash Equivalent Item [Line Items]
Cash	$ 144		$ 144					£ 105	$ 368		£ 294