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Variable Interest Entity and Noncontrolling Interests - Income or loss attributable to third party investors (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Noncontrolling Interest [Line Items]      
Amounts attributable to non-redeemable noncontrolling interests $ (53,076) $ (40,072) $ 48,507
Amounts attributable to redeemable noncontrolling interests (7,114) (16,909) (18,357)
Net (income) loss attributable to noncontrolling interests (60,190) (56,981) 30,150
Other      
Noncontrolling Interest [Line Items]      
Amounts attributable to non-redeemable noncontrolling interests (53,076) (40,072) 48,507
Amounts attributable to redeemable noncontrolling interests (4,117) (16,909) (18,357)
Net (income) loss attributable to noncontrolling interests $ (60,190) $ (56,981) $ 30,150