Class N Redeemable Common Stock - Schedule of Class N Redeemable Common Stock (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended	12 Months Ended
	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Sep. 30, 2024	Dec. 31, 2023
Class of Stock [Line Items]
Class N Redeemable Common Stock repurchased (in shares)	271,506	279,136	258,624	229,355	323,706	401,116
Class N Redeemable Common Stock repurchased	$ 7,492	$ 7,826	$ 7,363	$ 6,831	$ 10,177	$ 13,025
Class N Common Stock
Class of Stock [Line Items]
Class N Redeemable Common Stock repurchased (in shares)	0	0	0	0	0	0
Affiliated entity
Class of Stock [Line Items]
Class N Redeemable Common Stock issued							$ 520,920
Affiliated entity | Class N Common Stock
Class of Stock [Line Items]
Class N Redeemable Common Stock issued (in shares)							14,289,602
MassMutual | Affiliated entity
Class of Stock [Line Items]
Class N Redeemable Common Stock issued							$ 421,189
MassMutual | Affiliated entity | Class N Common Stock
Class of Stock [Line Items]
Class N Redeemable Common Stock issued (in shares)							14,289,602
MassMutual | Affiliated entity | Class N Common Stock | Initial Subscription Agreement
Class of Stock [Line Items]
Class N Redeemable Common Stock issued (in shares)							16,827,393	16,320,994
Class N Redeemable Common Stock issued							$ 495,984	$ 481,299
Class N Redeemable Common Stock repurchased (in shares)							2,537,790	2,537,790
Class N Redeemable Common Stock repurchased							$ 74,795	$ 74,795