Consolidated Statements of Operations - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Net Investment Income [Line Items]
Investment income		$ 365,568	$ 434,374	$ 454,914
Expenses:
Interest and other debt expenses		111,558	113,718	111,302
Management fees		33,449	35,232	35,470
Incentive fees		26,224	17,212	49,417
Professional fees		3,324	4,998	3,536
Directors' fees		828	828	823
Other general and administrative expenses		4,592	4,535	4,269
Total expenses		179,975	176,523	204,817
Fee waivers		0		(1,986)
Net expenses		179,975	176,523	202,831
Net investment income before taxes		185,593	257,851	252,083
Income tax expense, including excise tax		4,026	5,298	4,842
Net investment income after taxes		181,567	252,553	247,241
Net change in unrealized appreciation (depreciation) from:
Net realized and unrealized gains (losses)		(62,220)	(189,502)	(50,732)
(Provision) benefit for taxes on realized gain/loss on investments		(80)	(492)	(1,210)
(Provision) benefit for taxes on unrealized appreciation/depreciation on investments		0	308	575
Net increase (decrease) in net assets from operations		$ 119,267	$ 62,867	$ 195,874
Weighted average shares outstanding		115,576,890	114,673,460	108,305,428
Net investment income per share basic	[1]	$ 1.57	$ 2.2	$ 2.28
Net investment income per share diluted		1.57	2.2	2.28
Earnings per share basic		1.03	0.55	1.81
Earnings per share diluted		$ 1.03	$ 0.55	$ 1.81
Foreign Currency Forward Contracts
Net realized gain (loss) from:
Net realized gain (loss)		$ 0	$ (703)
Net change in unrealized appreciation (depreciation) from:
Net change in unrealized appreciation (depreciation)		(214)	688	$ (242)
Foreign Currency Translations and Other Transactions
Net realized gain (loss) from:
Net realized gain (loss)		506	5,236	404
Net change in unrealized appreciation (depreciation) from:
Net change in unrealized appreciation (depreciation)		(4,048)	299	(4,482)
Non-Controlled/Non-Affiliated Investments
Net Investment Income [Line Items]
Interest income		322,663	374,200	414,711
Dividend income		0	2
Payment-in-kind income		30,413	50,094	33,662
Other income		4,172	3,733	3,099
Net realized gain (loss) from:
Net realized gain (loss)		(89,292)	(155,950)	(49,409)
Net change in unrealized appreciation (depreciation) from:
Net change in unrealized appreciation (depreciation)		51,535	(35,110)	5,529
Non-Controlled Affiliated Investments
Net Investment Income [Line Items]
Interest income		4,882	3,912	2,286
Dividend income		785	1,970	908
Payment-in-kind income		2,488	335	207
Other income		165	128	41
Net realized gain (loss) from:
Net realized gain (loss)		(33,824)	(2,015)	(0)
Net change in unrealized appreciation (depreciation) from:
Net change in unrealized appreciation (depreciation)		13,117	$ (1,947)	(2,532)
Controlled Affiliated Investments
Net realized gain (loss) from:
Net realized gain (loss)		0		(22,366)
Net change in unrealized appreciation (depreciation) from:
Net change in unrealized appreciation (depreciation)		$ 0		$ 22,366

[1] The per share data was derived by using the weighted average shares outstanding during the applicable period that the shares were outstanding, except for distributions recorded, which reflects the actual amount per share for the applicable period.