Income Taxes - Additional Information (Details) $ in Thousands	9 Months Ended		12 Months Ended
	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2024 USD ($) Investment	Dec. 31, 2023 USD ($) Investment	Dec. 31, 2022 USD ($) Investment
Tax Credit Carryforward [Line Items]
Increase (decrease) in distributable earnings	$ 1,900	$ 2,300	$ 3,800
Increase (decrease) in additional paid in capital	1,900	2,300	3,800
Deferred tax liability pertaining to net unrealized gains related to investments	2,800	3,300	5,200	$ 2,800	$ 3,300
Current tax expense			200	100	100
Deferred tax expense (benefit)			$ 2,600	$ (600)	$ 600
Number of investment | Investment			8	7	5
Deferred tax asset	900	800	$ 600	$ 900	$ 800
Tax cost of investments	$ 3,256,630	$ 2,787,005	3,535,963	3,256,630	2,787,005
Estimated gross unrealized gains on tax cost investment			207,435	159,281	109,609
Estimated gross unrealized loss on tax cost investment			216,975	135,606	105,786
Net expense for federal excise tax			$ 3,800	$ 2,300	$ 2,200