Consolidated Statements of Cash Flows (unaudited) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Sep. 30, 2023
Cash flows from operating activities
Net increase (decrease) in net assets resulting from operations	$ 75,776	$ 25,581
Adjustments to reconcile net increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Amortization of deferred debt issuance costs	2,109	1,748
Accretion of discounts and amortization of premiums on investments	(3,673)	(3,893)
Accretion of discounts and amortization of premiums on issued debt securities	41	421
Net realized (gain) loss on investments	(909)	(4,017)
Net realized (gain) loss on foreign currency transactions	(187)	1,186
Net realized (gain) loss on forward currency contracts	0	(463)
Net change in unrealized (appreciation) depreciation on investments	9,304	41,071
Net change in unrealized (appreciation) depreciation on translation of assets and liabilities in foreign currencies	(6,187)	(15,897)
Proceeds from (fundings of) revolving loans, net	(235)	(868)
Fundings of investments	(73,242)	(248,882)
Proceeds from principal payments and sales of portfolio investments	179,411	253,833
Proceeds from settlements of forward currency contracts	0	463
Payment-in-kind interest capitalized	(13,715)	(7,777)
Non-cash dividends capitalized	(4,251)	(3,449)
Changes in operating assets and liabilities:
Interest receivable	3,560	(7,540)
Receivable from investments sold	0	(463)
Other assets	(12,390)	98
Interest payable	1,834	4,558
Management and incentive fees payable	(36)	1,651
Accrued trustee fees	(100)	(199)
Accounts payable and other liabilities	1,105	1,308
Net cash provided by (used in) operating activities	163,629	52,918
Cash flows from financing activities
Borrowings on debt	563,746	77,080
Repayments of debt	(629,508)	(88,000)
Capitalized debt issuance costs	(5,314)	(178)
Distributions paid	(59,736)	(47,245)
Purchases of common stock for dividend reinvestment plan	0	(9,151)
Net cash provided by (used in) financing activities	(130,812)	(67,494)
Net change in cash and cash equivalents, foreign currencies and restricted cash and cash equivalents	32,817	(14,576)
Effect of foreign currency exchange rates	396	56
Cash and cash equivalents, foreign currencies and restricted cash and cash equivalents, beginning of period	140,206	180,553	$ 180,553
Cash and cash equivalents, foreign currencies and restricted cash and cash equivalents, end of period	173,419	166,033	140,206
Supplemental disclosure of cash flow information:
Cash paid during the period for interest	37,576	27,518
Distributions declared for the period	74,622	56,396
Supplemental disclosure of non-cash financing activities:
Stock issued in connection with dividend reinvestment plan	14,886	0
Reconciliation of cash and cash equivalents, foreign currencies and restricted cash and cash equivalents and restricted foreign currencies
Cash and cash equivalents	70,691		65,617
Foreign currencies (cost of $5,873 and $4,540, respectively)	5,967		4,208
Restricted cash and cash equivalents	96,761		70,381
Total cash and cash equivalents, foreign currencies and restricted cash and cash equivalents shown in the Consolidated Statements of Cash Flows	173,419	166,033	$ 140,206
Interest rate swap
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 derivatives	(301)	0
Foreign exchange
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 forward currency contracts	0	(463)
Net change in unrealized (appreciation) depreciation on derivatives	$ 5,715	$ 14,448