Supplemental Disclosures of Cash Flow Information and Non-Cash Financing and Investing Activities - Schedule of Reconciliation of Cash and Cash Equivalents Inclusive of Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020	Dec. 31, 2019
Supplemental Cash Flow Elements [Abstract]
Cash and cash equivalents	$ 678,744	$ 817,398	$ 385,788
Restricted cash	461,980		389,390
Total cash and cash equivalents inclusive of restricted cash at the end of the period	$ 1,140,724	$ 1,271,915	$ 775,178	$ 962,975