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Summary of Significant Accounting Policies and Practices (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Change in operating assets and liabilities, net of effect of business combinations:    
Cash reserved for users   $ 0
Net cash flows used in operating activities $ (356,718) (59,737)
Net increase in cash, cash equivalents and restricted cash (392,096) 1,018,884
Cash and cash equivalents and restricted cash at the beginning of period 2,629,842 2,104,976
Cash and cash equivalents and restricted cash, end of period $ 2,237,746 3,123,860
Reported    
Change in operating assets and liabilities, net of effect of business combinations:    
Cash reserved for users   (18,014)
Net cash flows used in operating activities   (77,751)
Net increase in cash, cash equivalents and restricted cash   1,000,870
Cash and cash equivalents and restricted cash at the beginning of period   1,817,258
Cash and cash equivalents and restricted cash, end of period   2,818,128
Adjustments    
Change in operating assets and liabilities, net of effect of business combinations:    
Cash reserved for users   18,014
Net cash flows used in operating activities   18,014
Net increase in cash, cash equivalents and restricted cash   18,014
Cash and cash equivalents and restricted cash at the beginning of period   287,718
Cash and cash equivalents and restricted cash, end of period   $ 305,732