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Investments in Affiliates (Investments in Affiliates) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates $ 104,792us-gaap_EquityMethodInvestments $ 116,820us-gaap_EquityMethodInvestments
Telesat Holdings Inc [Member]    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates 74,329us-gaap_EquityMethodInvestments
/ us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis
= lorl_TelesatHoldingsIncMember		 60,157us-gaap_EquityMethodInvestments
/ us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis
= lorl_TelesatHoldingsIncMember
XTAR, LLC [Member]    
Schedule of Equity Method Investments [Line Items]    
Investments in affiliates $ 30,463us-gaap_EquityMethodInvestments
/ us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis
= lorl_XtarLlcMember		 $ 56,663us-gaap_EquityMethodInvestments
/ us-gaap_InvestmentsInAndAdvancesToAffiliatesCategorizationAxis
= lorl_XtarLlcMember