Fair Value of Financial Instruments - Schedule of Reconciliation of the Beginning and Ending Balances for Investments that Use Level 3 Inputs (Parenthetical) (Detail) $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($)
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers in	$ 19,463	[1]
Transfer from Investments	19,463	[1]
First Lien Senior Secured [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers in	16,555	[1]
Transfer from Investments	19,463	[1]
First Lien Senior Secured [Member] | Iinvestment Restructuring [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfer from Investments	9,300
Equity Funds [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Transfers in	$ 2,908	[1]

[1] During the six months ended June 30, 2024, there was a transfer from senior secured debt to equity as a result of an investment restructuring, in which $9.3 million of senior secured debt was exchanged for equity with a fair market value of $2.9 million.