Earnings Per Share (Schedule of Dilutive Impact of Equity Method Investee Stock Options) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net (loss) income per share:
Net income - basic	$ 51,172	$ 6,247	$ 3,395	$ 82,990
Less: Adjustment for dilutive effect of Telesat stock options	(257)	(51)	(46)	(535)
Net income - diluted	$ 50,915	$ 6,196	$ 3,349	$ 82,455