Income Taxes (Summary of Uncertain Tax Positions Included in Income Tax Provision) (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Taxes [Abstract]
Current (provision) benefit for UTPs	$ (251)	$ (332)	$ (496)	$ (808)
Deferred benefit (provision) for UTPs	54	72	63	172
Tax (provision) benefit for UTPs	$ (197)	$ (260)	$ (433)	$ (636)

Income tax provision benefit for uncertain tax positions.

No definition available.

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Namespace Prefix:	lorl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration