Variable Interest Entities - Additional Information (Details) $ in Thousands	Mar. 31, 2021 USD ($) entity	Dec. 31, 2020 USD ($)
Investments In Variable Interest Entities [Abstract]
Number of consolidated entities | entity	3
Variable Interest Entity [Line Items]
Maximum exposure to loss in unconsolidated VIEs	$ 867,187	$ 858,617
Total assets	142,346,620	115,511,007
Unconsolidated
Variable Interest Entity [Line Items]
Total assets	$ 867,187	$ 858,617