Variable Interest Entities (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Total unconsolidated variable interest entities:
Carrying value of variable interest - assets	$ 3,254,183	$ 2,851,894
Carrying value of variable interest - liabilities	1,733,066	1,583,403
Unconsolidated VIEs
Total unconsolidated variable interest entities:
Carrying value of variable interest - assets	13,016	11,530
Carrying value of variable interest - liabilities	0	0
Maximum exposure to loss:
Non-public equity	13,016	11,530
Total	$ 13,016	$ 11,530