Condensed Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Thousands		Sep. 30, 2021	Dec. 31, 2020	Sep. 30, 2020	Dec. 31, 2019
Statement of Cash Flows [Abstract]
Cash and cash equivalents		$ 862,151	$ 524,963
Restricted cash	[1]	77,577	103,522
Total cash, cash equivalents and restricted cash		$ 939,728	$ 628,485	$ 543,967	$ 487,122

[1] Includes amounts in consolidated variable interest entities (VIEs) presented separately in the table below.