Unaudited Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Cash flows from operating activities:
Net increase in net assets resulting from operations			$ 108,651	$ 92,451
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Repayments received / sales of portfolio investments			327,002	346,223
Loan origination and other fees received			17,335	11,843
Net realized (gain) loss on investments, before taxes			(7,389)	11,177
Net realized (gain) loss on foreign currency transactions	$ (569)	$ (83)	(1,292)	314
Net realized (gain) loss on forward currency contracts			3,643	8,308
Net unrealized (appreciation) depreciation on investments	(26,108)	5,014	(45,489)	3,098
Net unrealized (appreciation) depreciation on foreign currency transactions	10,939	(720)	14,857	(2,570)
Net unrealized (appreciation) depreciation on forward currency contracts	4,683	5,036	44,397	(20,904)
Payment-in-kind interest / dividends			(14,450)	(11,474)
Amortization of deferred financing fees			1,467	1,181
Accretion of loan origination and other fees			(7,216)	(7,387)
Amortization / accretion of purchased loan premium / discount			(2,869)	(468)
Payments for derivative contracts			(39,661)	(19,527)
Proceeds from derivative contracts			36,018	11,219
Changes in operating assets and liabilities:
Interest and fees receivable			(904)	2,363
Prepaid expenses and other assets			205	123
Accounts payable and accrued liabilities			1,007	261
Interest payable			2,129	(7,402)
Net cash provided by (used in) operating activities			(738,572)	(118,654)
Cash flows from financing activities:
Borrowings under credit facilities			505,781	106,510
Repayments under credit facilities			(536,617)	(182,625)
Repayments of debt securitization			0	(57,589)
Proceeds from notes payable			400,000	0
Financing fees paid			(9,743)	(6,213)
Issuance of common stock			486,266	480,484
Cash dividends / distributions paid			(116,298)	(84,565)
Purchases of shares in repurchase plan			(18,646)	(32,559)
Net cash provided by (used in) financing activities			710,743	223,443
Net increase (decrease) in cash and foreign currencies			(27,829)	104,789
Cash and foreign currencies, beginning of period			131,066	83,563	$ 83,563
Cash and foreign currencies, end of period	103,237	188,352	103,237	188,352	131,066
Supplemental disclosure of cash flow information:
Cash paid for interest			40,808	48,315
Excise taxes paid during the period			2,447	1,190
Summary of non-cash financing transactions:
Dividends / distributions paid through DRIP share issuances			12,118	7,906
Share repurchases payable	$ 58,588	$ 3,501	58,588	3,501	$ 5,847
Investments Excluding Money Market Funds
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Purchases of portfolio investments			(1,175,625)	(527,416)
Short-term investments
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Purchases of portfolio investments			$ (388)	$ (10,067)