Other Investments - Components of Other Debt Investments, Net (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Cost basis	$ 103,768		$ 102,878
Discount	(10,442)		(10,309)
Allowance for credit losses	(2,232)		0
Total other debt investments, net	91,094		$ 92,569
Interest income	$ 3,300	$ 0