CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands		3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Cash flows from operating activities:
Net increase (decrease) in net assets resulting from operations		$ 58,183	$ 30,328	$ 152,900	$ 80,943
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Net realized (gain) loss on investments				(719)	622
Net realized (gain) loss on foreign currency forward contracts				23	(1,739)
Net realized (gain) loss on foreign currency and other transactions		220	10	126	(166)
Net change in unrealized (gain) loss on investments				(15,224)	871
Net change in unrealized (gain) loss on foreign currency forward contracts		1,786	(1,948)	105	1,211
Net change in unrealized (gain) loss on foreign currency and other transactions		2,881	0	2,588	0
Payment-in-kind interest capitalized				(10,010)	(5,500)
Net accretion of discounts and amortization of premiums				(7,323)	(4,104)
Purchases of investments				(1,498,871)	(600,755)
Proceeds from principal payments and sale of investments and settlement of forward contracts				400,236	105,468
Amortization of debt issuance costs		2,508	1,578	6,733	3,831
Changes in operating assets and liabilities:
Interest and dividend receivable				(16,759)	(15,899)
Receivable for unsettled trades				0	(3,341)
Other assets				96	9,092
Interest payable				13,927	3,488
Payable for unsettled trades				(57,455)	(13,690)
Base management fees payable				4,102	1,954
Incentive fees payable				4,180	1,633
Accounts payable and accrued expenses				7,518	2,434
Directors’ fees payable				38	22
Net cash provided by (used in) operating activities				(1,013,789)	(433,625)
Cash flows from financing activities:
Borrowings on debt				2,147,431	850,850
Repayments of debt				(1,512,211)	(750,791)
Proceeds from short-term borrowings				0	180,198
Repayments of short-term borrowings				0	(112,188)
Debt issuance costs capitalized				(13,052)	(2,790)
Proceeds from issuance of common stock				549,392	361,690
Repurchases of common stock				(50,370)	(22,320)
Stockholder distributions paid				(74,624)	(43,477)
Net cash provided by (used in) financing activities				1,046,566	461,172
Net increase (decrease) in cash and restricted cash and cash equivalents				32,777	27,547
Effect of foreign currency exchange rates				16	166
Cash and restricted cash and cash equivalents, beginning of period				77,755	52,204	$ 52,204
Cash and restricted cash and cash equivalents, end of period	$ 110,548	110,548	79,917	110,548	79,917	77,755
Supplemental disclosure of cash flow information:
Cash interest paid during the period				74,686	34,097
Cash paid for income taxes, including excise taxes, during the period				586	209
Supplemental disclosure of non-cash activities:
Stock issued in connection with dividend reinvestment plan	21,010	21,010	10,672	54,276	26,803
Non-cash purchases of investments				(2,100)	0
Reconciliation of cash and restricted cash
Cash and cash equivalents	20,357	20,357	7,563	20,357	7,563	17,586	$ 5,716
Restricted cash and cash equivalents	90,191	90,191	72,354	90,191	72,354	60,169	46,488
Total cash and restricted cash and cash equivalents shown on the Consolidated Statements of Cash Flows	$ 110,548	$ 110,548	$ 79,917	$ 110,548	$ 79,917	$ 77,755	$ 52,204