Income Taxes (Narrative) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Fed Tax On GILTI		$ 0
Deferred tax assets		27,339	$ 37,945
Foreign tax credit carryforwards		109,600
Reduction to unrecognized tax benefits		0	18
Liabilities for uncertain tax positions		19,769	17,352
Unrecognized tax benefits, interest on income taxes accrued		3,300
Unrecognized tax benefits that would reduce the income tax provision		8,400
Valuation allowance		128,414	128,483
Changes in valuation allowance		$ (100)	$ 100
Internal Revenue Service (IRS) [Member]
Income Tax Contingency [Line Items]
Statute of limitations to expire during next twelve months		2014
Operating loss carryforwards		$ 43,100
Operating loss carryforwards, limitations on use		$ 32,600
Federal Income Taxes and State Income Taxes [Member]
Income Tax Contingency [Line Items]
Net operating loss carryforwards, expiration period		2022 to 2034
New York [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards		$ 1,500
Forecast [Member]
Income Tax Contingency [Line Items]
Reduction to unrecognized tax benefits	$ 16,400
Telesat Holdings Inc [Member] | Federal [Member]
Income Tax Contingency [Line Items]
Deferred tax assets		$ 0