Summary of Significant Accounting Policies - Narrative (Details) € in Thousands, £ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2025 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2025 AUD ($)	Mar. 31, 2025 CAD ($)	Mar. 31, 2025 EUR (€)	Mar. 31, 2025 GBP (£)	Dec. 31, 2024 USD ($)	Dec. 31, 2024 EUR (€)	Dec. 31, 2024 GBP (£)
Restricted Cash and Cash Equivalents Items [Line Items]
Minimum term prior to record date fixed by board under dividend reinvestment plan	10 days
Unamortized deferred financing costs	$ 24,029						$ 23,351
Amortization of debt issuance costs	$ 2,853	$ 1,999
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	$ 375	125
Payables for excise taxes	325						1,050
U.S. federal and state corporate-level income taxes, net tax expense	0	$ 0
U.S. federal and state corporate-level income taxes, payables	0						0
Australia, Dollars
Restricted Cash and Cash Equivalents Items [Line Items]
Cash	76		$ 122
Canada, Dollars
Restricted Cash and Cash Equivalents Items [Line Items]
Cash	64			$ 92
Euro Member Countries, Euro
Restricted Cash and Cash Equivalents Items [Line Items]
Cash	339				€ 313		14	€ 14
United Kingdom, Pounds
Restricted Cash and Cash Equivalents Items [Line Items]
Cash	$ 959					£ 742	$ 368		£ 294