Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities - Gains And Losses On Sales And Changes In Carrying Amounts Of Investments (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Marketable Investment Securities, Restricted Cash and Cash Equivalents, and Other Investment Securities
Costs related to early redemption of debt	$ (6)	$ (2,600)
Equity in earnings (losses) of affiliates	679	903
Other	117	189
Total	$ 790	$ (1,508)