Commitments and Contingencies - Narrative (Details) - USD ($) $ in Thousands	9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Loss Contingencies [Line Items]
Capital commitments from investors	$ 4,148,981	$ 4,120,907
Investor
Loss Contingencies [Line Items]
Capital commitments from investors	4,100,000		$ 4,100,000
Undrawn capital commitments	1,600,000		2,400,000
Affiliated Entity
Loss Contingencies [Line Items]
Capital commitments from investors	54,100		54,000
Undrawn capital commitments	$ 2,700		$ 13,800