Income Taxes - Additional Information (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($) Investment	Dec. 31, 2023 USD ($) Investment
Tax Credit Carryforward [Line Items]
Increase (decrease) in distributable earnings	$ 1,900	$ 6,300	$ 3,800
Increase (decrease) in additional paid in capital	1,900	6,300	3,800
Deferred tax liability pertaining to net unrealized gains related to investments	2,800	4,600	5,200	$ 2,800
Current tax expense			200	100
Deferred tax expense (benefit)		(500)	$ 2,600	$ (600)
Number of investment | Investment			8	7
Deferred tax asset	900	600	$ 600	$ 900
Tax cost of investments	3,256,630	3,332,367	3,535,963	3,256,630
Estimated gross unrealized gains on tax cost investment	159,281	219,540	207,435	159,281
Estimated gross unrealized loss on tax cost investment	$ 135,606	231,975	216,975	135,606
Net expense for federal excise tax		$ 5,300	$ 3,800	$ 2,300