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, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Earnings Per Share [Abstract]
Income from continuing operations — basic	$ 6,247	$ 46,219	$ 82,990	$ 50,997
Less: Adjustment for dilutive effect of Telesat stock options	(51)	(340)	(535)	(350)
Income from continuing operations — diluted	$ 6,196	$ 45,879	$ 82,455	$ 50,647

Amount after tax of income (loss) from continuing operations attributable to the parent.

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