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, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net (loss) income per share:
Net income - basic	$ (25,208)	$ 51,172	$ 26,999	$ 3,395
Less: Adjustment for dilutive effect of Telesat stock options		(257)	(1,129)	(46)
Net income - diluted		$ 50,915	$ 25,870	$ 3,349