Summary of Cash, Cash Equivalents and Restricted Cash Reported In Condensed Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Thousands		Jun. 30, 2021	Dec. 31, 2020	Jun. 30, 2020
Cash And Cash Equivalents Period Increase Decrease [Abstract]
Cash and cash equivalents		$ 199,017	$ 1,224,490	$ 539,622
Restricted cash and cash equivalents	[1]	$ 54,671	$ 54,664	$ 44,650
Restricted Cash and Cash Equivalents, Noncurrent, Asset, Statement of Financial Position [Extensible List]		Other	Other	Other
Total cash, cash equivalents and restricted cash		$ 253,688	$ 1,279,154	$ 584,272

[1] Restricted cash and cash equivalents is included in other assets on the accompanying consolidated balance sheet.