Fair Value Measurement - Schedule of Financial Assets and Liabilities at Fair Value (Details) - Fair Value, Recurring - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Financial assets:
Cash and cash equivalents	$ 3,369,353	$ 3,487,708
Total financial assets	3,677,558	3,810,347
Level 1
Financial assets:
Cash and cash equivalents	3,369,353	3,487,708
Total financial assets	3,677,558	3,810,347
Level 2
Financial assets:
Cash and cash equivalents	0	0
Total financial assets	0	0
Level 3
Financial assets:
Cash and cash equivalents	0	0
Total financial assets	0	0
Money market trust
Financial assets:
Restricted cash	67,613	68,961
Money market trust | Level 1
Financial assets:
Restricted cash	67,613	68,961
Money market trust | Level 2
Financial assets:
Restricted cash	0	0
Money market trust | Level 3
Financial assets:
Restricted cash	0	0
Time deposit
Financial assets:
Restricted cash	239,487	250,839
Long-term restricted cash	1,105	2,839
Time deposit | Level 1
Financial assets:
Restricted cash	239,487	250,839
Long-term restricted cash	1,105	2,839
Time deposit | Level 2
Financial assets:
Restricted cash	0	0
Long-term restricted cash	0	0
Time deposit | Level 3
Financial assets:
Restricted cash	0	0
Long-term restricted cash	$ 0	$ 0