Investments - Schedule of Investment Interest Income and Fee Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Schedule Of Investments [Line Items]
Total PIK interest income	$ 138,042	$ 129,571	$ 274,445	$ 245,143
Total fee income	11,072	7,888	16,205	11,827
Income Statement Location [Axis]: us-gaap:DividendIncomeOperating
Schedule Of Investments [Line Items]
Total PIK interest income	2,100	2,100	4,200	4,500
Income Statement Location [Axis]: us-gaap:FeeIncome
Schedule Of Investments [Line Items]
Total PIK interest income	16,245	14,790	30,943	25,018
Income Statement Location [Axis]: us-gaap:FeeIncome \| Expired commitments
Schedule Of Investments [Line Items]
Total fee income	747	715	1,310	1,032
Income Statement Location [Axis]: us-gaap:FeeIncome \| Early repayments
Schedule Of Investments [Line Items]
Total fee income	7,050	4,419	8,708	5,361
Income Statement Location [Axis]: us-gaap:InterestIncomeOperating
Schedule Of Investments [Line Items]
Total PIK interest income	104,135	95,421	208,217	183,238
Income Statement Location [Axis]: us-gaap:InterestIncomeOperatingPaidInKind
Schedule Of Investments [Line Items]
Total PIK interest income	12,342	13,635	25,256	27,108
Income Statement Location [Axis]: us-gaap:OtherInterestAndDividendIncome
Schedule Of Investments [Line Items]
Total PIK interest income	3,220	3,625	5,829	5,279
Income Statement Location [Axis]: us-gaap:OtherRecurringIncome
Schedule Of Investments [Line Items]
Total fee income	$ 3,275	$ 2,754	$ 6,187	$ 5,434