Earnings Per Share (Schedule of Dilutive Impact of Equity Method Investee Stock Options) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Net income per share:
Net income - basic	$ 21,491	$ 73,566	$ 52,207	$ (47,777)
Less: Adjustment for dilutive effect of Telesat stock options	(1,642)	(398)	(1,797)
Net income - diluted	$ 19,849	$ 73,168	$ 50,410