Investments Investment Income Table (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net Investment Income [Line Items]
Income from investments, net	$ 234	$ 2,727
Short-term Debt [Member]
Net Investment Income [Line Items]
Income from investments, net	0	500
Equity securities, FV-NI [Member]
Net Investment Income [Line Items]
Income from investments, net	240	1,203
Equity Method Investments [Member]
Net Investment Income [Line Items]
Income from investments, net	$ (6)	$ 1,024