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Cash, Cash Equivalents and Restricted Cash (Tables)
3 Months Ended
Mar. 31, 2021
Short-Term Investments And Fair Value Measurement [Abstract]  
Schedule of Cash and Cash Equivalents and Restricted Cash
The following tables summarize the Company's cash, cash equivalents, and restricted cash as of March 31, 2021 and December 31, 2020:

 As of March 31, 2021
 Cash and cash equivalentsOther Current AssetsNon-current AssetsTotal
 (in thousands)
Cash$4,019,585 $2,159 $30,443 $4,052,187 
Level 1 securities:
Money market funds4,083,887 — 146 4,084,033 
Level 2 securities:
Foreign Time Deposits300,233 — — 300,233 
$8,403,705 $2,159 $30,589 $8,436,453 

 As of December 31, 2020
 Cash and cash equivalentsOther Current AssetsNon-current AssetsTotal
 (in thousands)
Cash$3,331,860 $1,783 $31,284 $3,364,927 
Level 1 securities:
Money market funds4,573,690 — 253 4,573,943 
Level 2 securities:
Foreign Time Deposits300,000 — — 300,000 
$8,205,550 $1,783 $31,537 $8,238,870