Basis of Presentation (Assets and Liabilities Measured at Fair Value) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Money Market Funds [Member] | Level 1 [Member]
Assets, Fair Value
Cash and cash equivalents	$ 256,915	$ 254,552
Sale of SSL, Nov. 02, 2012 [Member] | Level 3 [Member] | Fair Value, Nonrecurring [Member]
Assets, Fair Value
Indemnification - sale of SSL	598	2,410
Globalstar do Brasil S.A. [Member] | Level 3 [Member]
Liabilities, Fair Value
Indemnification - Globalstar do Brasil S.A.	$ 145	$ 184