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Cash, cash equivalents and restricted cash (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Jun. 30, 2021
Dec. 31, 2020
Cash and Cash Equivalents [Abstract]        
Cash and cash equivalents $ 1,229,008 $ 1,728,794 $ 1,402,918  
Restricted cash 173,441 185,959 190,447  
Total cash, cash equivalents and restricted cash $ 1,402,449 $ 1,914,753 $ 1,593,365 $ 1,495,290