Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024
Cash flows from operating activities:
Net increase (decrease) in net assets resulting from operations	$ 437,288	$ 531,605
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Net change in unrealized (appreciation) depreciation on investments	89,206	(15,872)
Net change in unrealized (appreciation) depreciation on derivative instruments	1,541	0
Net change in unrealized (appreciation) depreciation on translation of assets and liabilities in foreign currencies	(1,125)	2,152
Net realized (gain) loss on investments	1,977	16,650
Net change due to hedging activity	(814)	0
Net realized (gain) loss on foreign currency transactions	13,085	0
Net accretion of discount and amortization of premium	(41,004)	(29,029)
Payment-in-kind interest capitalized	(73,386)	(68,241)
Amortization of deferred financing costs	4,204	4,815
Amortization of original issue discount and debt issuance costs (including premiums and discounts)	11,029	6,908
Purchases of investments	(2,227,166)	(2,565,910)
Proceeds from sale of investments and principal repayments	1,600,101	574,167
Changes in operating assets and liabilities:
Interest receivable	6,846	(17,909)
Receivable for investments	(14,271)	(53,289)
Derivative instruments, net	(13,193)	0
Receivable from broker	(6,368)	(1,770)
Payable for investments	(13,614)	(3,537)
Due to affiliates	(2,353)	2,489
Management fees payable	2,654	7,143
Income based incentive fees payable	(7,454)	3,790
Capital gains based incentive fees payable	0	264
Interest payable	4,409	(16,009)
Accrued expenses and other liabilities	(585)	(842)
Net cash provided by (used in) operating activities	(228,993)	(1,622,425)
Cash flows from financing activities:
Borrowings on debt	1,727,066	2,025,738
Repayments on debt	(1,228,031)	(588,500)
Deferred financing costs paid	(3,558)	(4,352)
Debt issuance costs paid	(2,402)	(1,070)
Dividends paid in cash	(507,195)	(427,520)
Proceeds from issuance of Common Shares, net of offering and underwriting costs	274,453	660,729
Net cash provided by (used in) financing activities	260,333	1,665,025
Net increase (decrease) in cash and cash equivalents	31,340	42,600
Effect of foreign exchange rate changes on cash and cash equivalents	(11,055)	(3,280)
Cash and cash equivalents, beginning of period	229,606	154,857
Cash and cash equivalents, end of period	249,891	194,177
Supplemental information and non-cash activities:
Interest paid during the period	278,653	237,732
Distribution payable	177,837	160,912
Reinvestment of distributions during the period	15,984	15,981
Accrued but unpaid deferred financing costs	0	105
Accrued but unpaid debt issuance costs	250	500
Receivable for shares sold	0	1,672
Excise and other taxes paid	$ 15,076	$ 11,430