Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Cash Flows from Operating Activities
Increase (decrease) in net assets resulting from operations	$ 170,517	$ 186,566	$ 222,023
Adjustments to reconcile increase (decrease) in net assets resulting from operations to net cash provided by (used in) operating activities:
Net change in unrealized (gains) losses on investments	(44,777)	52,794	(18,854)
Net change in unrealized (gains) losses on foreign currency transactions	35,915	(13,379)	6,393
Net change in unrealized (gains) losses on interest rate swaps	0	0	(174)
Net realized (gains) losses on investments	47,415	(9,037)	(12,253)
Net realized (gains) losses on foreign currency transactions	870	(610)	(335)
Net amortization of discount on investments	(26,658)	(21,101)	(17,596)
Amortization of deferred financing costs	6,743	6,903	5,245
Amortization of discount on debt	1,857	1,614	899
Purchases and originations of investments, net	(1,118,107)	(1,096,140)	(943,451)
Proceeds from investments, net	112,151	85,224	42,152
Repayments on investments	1,227,251	778,177	472,536
Paid-in-kind interest	(25,075)	(29,612)	(18,161)
Changes in operating assets and liabilities:
Interest receivable	(3,103)	(2,826)	(7,605)
Interest receivable paid-in-kind	(511)	277	(1,518)
Prepaid expenses and other assets	(4,293)	1,628	(3,049)
Management fees payable to affiliate	(159)	991	1,436
Incentive fees on net investment income payable to affiliate	(1,677)	562	533
Incentive fees on net capital gains accrued to affiliate	(5,071)	(5,375)	4,382
Payable to affiliate	(469)	833	(463)
Other liabilities	28,758	17,020	31,072
Net Cash Provided by (Used in) Operating Activities	401,577	(45,491)	(236,788)
Cash Flows from Financing Activities
Borrowings on debt	1,336,176	1,784,906	1,546,233
Repayments on debt	(1,567,777)	(1,653,061)	(1,233,264)
Deferred financing costs	(7,317)	(8,810)	(9,415)
Proceeds from issuance of common stock, net of offering and underwriting costs	0	93,308	89,204
Dividends paid to stockholders	(170,325)	(168,720)	(156,421)
Net Cash Provided by (Used in) Financing Activities	(409,243)	47,623	236,337
Net Increase (Decrease) in Cash, Cash Equivalents, and Restricted Cash	(7,666)	2,132	(451)
Cash, cash equivalents, and restricted cash, beginning of period	27,328	25,196	25,647
Cash, Cash Equivalents, and Restricted Cash, End of Period	19,662	27,328	25,196
Supplemental Information:
Interest paid during the period	119,447	139,783	119,396
Excise and other taxes paid during the period	5,777	2,280	2,437
Dividends declared during the period	192,867	193,443	179,966
Non-Cash Financing Activities:
Reinvestment of dividends during the period	$ 22,542	$ 24,723	$ 23,545