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Investments - Equity Investments Realized and Unrealized Gains (Losses) (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Jun. 30, 2021
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2021
Oct. 31, 2020
Investments, Debt and Equity Securities [Abstract]          
Net realized gains (losses) recognized on equity investments sold $ 3,000 $ 11,759 $ 0 $ 4,236 $ 1,591
Net unrealized gains (losses) recognized on equity investments held as of the end of the period   13,448 3,830 121,167 1,643
Total net gains (losses) recognized in Other income (expense), net   $ 25,207 $ 3,830 $ 125,403 $ 3,234