Other Investments - Components of Other Investments (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Dec. 31, 2019
Other investments, net:
Equity method investments	$ 151,899	$ 166,209
Other equity investments	34,104	66,627
Other debt investments, net	98,235	92,569
Total other investments, net	$ 284,238	$ 325,405