Document And Entity Information	3 Months Ended
	Mar. 31, 2013	Apr. 30, 2013 Voting Common Stock [Member]	Apr. 30, 2013 Nonvoting Common Stock [Member]
Entity Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Mar. 31, 2013
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q1
Trading Symbol	lorl
Entity Registrant Name	LORAL SPACE & COMMUNICATIONS INC.
Entity Central Index Key	0001006269
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		21,262,340	9,505,673