Other Investments (Summarized Investee Financial Information) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Schedule of Equity Method Investments [Line Items]
Revenues	$ 113,260	$ 173,461
Expenses	119,317	198,783
Net Income Attributable to Parent	5,469	(15,576)
SAFE
Schedule of Equity Method Investments [Line Items]
Revenues	43,507	40,165
Expenses	27,174	23,587
Net Income Attributable to Parent	$ 16,908	$ 17,347