Quarterly report pursuant to Section 13 or 15(d)

Long-Term Investments - Schedule of Carrying Value and Ownership Percentage of Investment (Parenthetical) (Details)

v3.21.1
Long-Term Investments - Schedule of Carrying Value and Ownership Percentage of Investment (Parenthetical) (Details)
Mar. 31, 2021
Mar. 19, 2021
Jun. 30, 2020
Sep. 19, 2019
Schedule Of Equity Method Investments [Line Items]        
Percentage of investments in privately-held entities accounted under equity method       31.20%
JMB        
Schedule Of Equity Method Investments [Line Items]        
Percentage of investments in privately-held entities accounted under equity method 0.00% 100.00% 20.60%