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Additional Cash Flow Information
3 Months Ended
Mar. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Additional Cash Flow Information Additional Cash Flow Information
The cash, cash equivalents and restricted cash at the beginning and ending of each period presented in the Company’s condensed consolidated statements of cash flows consisted of the following:
Three Months Ended March 31,
20212020
Beginning of periodEnd of periodBeginning of periodEnd of period
(in thousands)
Cash and cash equivalents
$5,988,187 $6,304,330 $3,109,322 $3,593,412 
Prepaid expenses and other current assets
658 8,577 8,004 8,552 
Other assets
— — 3,355 — 
Cash, cash equivalents and restricted cash per condensed consolidated statement of cash flows$5,988,845 $6,312,907 $3,120,681 $3,601,964