Investments in Affiliates (Equity in Net Income (Losses) of Affiliates) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Schedule of Equity Method Investments [Line Items]
Equity in net income (loss) of affiliates	$ 101,403	$ (24,412)
Telesat Canada [Member]
Schedule of Equity Method Investments [Line Items]
Equity in net income (loss) of affiliates	$ 101,403	$ (24,412)