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Investments in Real Estate and Real Estate Under Construction - Schedule of Acquired Properties (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2014 Property | Dec. 31, 2013
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | $ 212,313 us-gaap_BusinessCombinationConsiderationTransferred1 | $ 532,538 us-gaap_BusinessCombinationConsiderationTransferred1 |
Land and Land Estate | 33,621 lxp_LandAcquiredDuringPeriod | 253,492 lxp_LandAcquiredDuringPeriod |
Building and Improvements | 142,247 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod | 180,724 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod |
Above Market Lease Value |  | 673 us-gaap_FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross |
Lease in-place Value | 36,445 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases | 97,649 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases |
Number of real estate properties | 215 us-gaap_NumberOfRealEstateProperties |  |
Construction in progress | 14,946 us-gaap_DevelopmentInProcess | 4,306 us-gaap_DevelopmentInProcess |
Above Market Leases [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Weighted-average life of intangible assets (years) |  | 15 years 3 months 18 days |
Leases, Acquired-in-Place [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Weighted-average life of intangible assets (years) | 37 years 6 months | 82 years 6 months |
Industrial Property [Member] | Rantoul, Illinois [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 41,277 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_RantoulIllinoisMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Land and Land Estate | 1,304 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_RantoulIllinoisMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Building and Improvements | 32,562 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_RantoulIllinoisMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Lease in-place Value | 7,411 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_RantoulIllinoisMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Industrial Property [Member] | Lewisburg, Tennessee [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 13,320 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_LewisburgTennesseeMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Land and Land Estate | 173 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_LewisburgTennesseeMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Building and Improvements | 10,865 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_LewisburgTennesseeMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Lease in-place Value | 2,282 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_LewisburgTennesseeMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Industrial Property [Member] | North Las Vegas, Nevada [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 28,249 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_NorthLasVegasNevadaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Land and Land Estate | 3,244 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_NorthLasVegasNevadaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Building and Improvements | 21,444 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_NorthLasVegasNevadaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Lease in-place Value | 3,561 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_NorthLasVegasNevadaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Industrial Property [Member] | Bingen, Washington [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 20,391 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_BingenWashingtonMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Land and Land Estate | 0 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_BingenWashingtonMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Building and Improvements | 18,075 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_BingenWashingtonMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Lease in-place Value | 2,316 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_BingenWashingtonMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Industrial Property [Member] | Anniston, Alabama [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 20,907 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_AnnistonAlabamaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Land and Land Estate | 1,201 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_AnnistonAlabamaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Building and Improvements | 16,771 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_AnnistonAlabamaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Lease in-place Value | 2,935 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_AnnistonAlabamaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |  |
Industrial Property [Member] | Long Island City, New York [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 42,124 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_LongIslandCityNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |
Land and Land Estate |  | 0 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_LongIslandCityNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |
Building and Improvements |  | 42,124 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_LongIslandCityNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |
Above Market Lease Value |  | 0 us-gaap_FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross / invest_InvestmentGeographicRegionAxis = lxp_LongIslandCityNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |
Lease in-place Value |  | 0 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_LongIslandCityNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |
Industrial Property [Member] | Houston, Texas [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 81,400 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_HoustonTexasMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |
Land and Land Estate |  | 15,055 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_HoustonTexasMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |
Building and Improvements |  | 57,949 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_HoustonTexasMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |
Above Market Lease Value |  | 0 us-gaap_FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross / invest_InvestmentGeographicRegionAxis = lxp_HoustonTexasMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |
Lease in-place Value |  | 8,396 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_HoustonTexasMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_IndustrialPropertyMember |
Office Property [Member] | Parachute, Colorado [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 13,928 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_ParachuteColoradoMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |  |
Land and Land Estate | 1,400 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_ParachuteColoradoMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |  |
Building and Improvements | 10,751 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_ParachuteColoradoMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |  |
Lease in-place Value | 1,777 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_ParachuteColoradoMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |  |
Office Property [Member] | Rock Hill, South Carolina [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 24,715 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_RockHillSouthCarolinaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |  |
Land and Land Estate | 1,601 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_RockHillSouthCarolinaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |  |
Building and Improvements | 18,989 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_RockHillSouthCarolinaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |  |
Lease in-place Value | 4,125 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_RockHillSouthCarolinaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |  |
Office Property [Member] | Denver, Colorado [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 34,547 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_DenverColoradoMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember | [1]
Land and Land Estate |  | 2,207 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_DenverColoradoMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember | [1]
Building and Improvements |  | 26,724 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_DenverColoradoMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember | [1]
Above Market Lease Value |  | 0 us-gaap_FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross / invest_InvestmentGeographicRegionAxis = lxp_DenverColoradoMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember | [1]
Lease in-place Value |  | 5,616 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_DenverColoradoMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember | [1]
Payments for tenant improvements |  | 3,825 us-gaap_PaymentsForTenantImprovements / invest_InvestmentGeographicRegionAxis = lxp_DenverColoradoMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |
Office Property [Member] | Other Locations [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 13,144 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_OtherLocationsMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember | [2]
Land and Land Estate |  | 1,522 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_OtherLocationsMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember | [2]
Building and Improvements |  | 10,374 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_OtherLocationsMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember | [2]
Above Market Lease Value |  | 0 us-gaap_FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross / invest_InvestmentGeographicRegionAxis = lxp_OtherLocationsMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember | [2]
Lease in-place Value |  | 1,248 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_OtherLocationsMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember | [2]
Construction in progress |  | 1,969 us-gaap_DevelopmentInProcess / invest_InvestmentGeographicRegionAxis = lxp_OtherLocationsMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |
Office Property [Member] | Omaha, Nebraska [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 39,125 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_OmahaNebraskaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |
Land and Land Estate |  | 2,058 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_OmahaNebraskaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |
Building and Improvements |  | 32,343 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_OmahaNebraskaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |
Above Market Lease Value |  | 0 us-gaap_FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross / invest_InvestmentGeographicRegionAxis = lxp_OmahaNebraskaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |
Lease in-place Value |  | 4,724 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_OmahaNebraskaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_OfficeBuildingMember |
Retail Site [Member] | Tuscaloosa, Alabama [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 8,397 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_TuscaloosaAlabamaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember | [3]
Land and Land Estate |  | 2,793 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_TuscaloosaAlabamaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember | [3]
Building and Improvements |  | 5,604 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_TuscaloosaAlabamaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember | [3]
Above Market Lease Value |  | 0 us-gaap_FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross / invest_InvestmentGeographicRegionAxis = lxp_TuscaloosaAlabamaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember | [3]
Lease in-place Value |  | 0 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_TuscaloosaAlabamaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember | [3]
Payments for leasing costs |  | 323 us-gaap_PaymentsForLeasingCosts / invest_InvestmentGeographicRegionAxis = lxp_TuscaloosaAlabamaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember |
Retail Site [Member] | Albany, Georgia [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 7,074 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_AlbanyGeorgiaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember | [4]
Land and Land Estate |  | 1,468 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_AlbanyGeorgiaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember | [4]
Building and Improvements |  | 5,606 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_AlbanyGeorgiaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember | [4]
Above Market Lease Value |  | 0 us-gaap_FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross / invest_InvestmentGeographicRegionAxis = lxp_AlbanyGeorgiaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember | [4]
Lease in-place Value |  | 0 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_AlbanyGeorgiaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember | [4]
Payments for leasing costs |  | 338 us-gaap_PaymentsForLeasingCosts / invest_InvestmentGeographicRegionAxis = lxp_AlbanyGeorgiaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_RetailSiteMember |
Land [Member] | New York, New York [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 30,426 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_NewYorkNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember | 302,000 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_NewYorkNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember | [5]
Land and Land Estate | 22,000 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_NewYorkNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember | 224,935 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_NewYorkNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember | [5]
Building and Improvements | 0 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_NewYorkNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember | 0 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_NewYorkNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember | [5]
Above Market Lease Value |  | 0 us-gaap_FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross / invest_InvestmentGeographicRegionAxis = lxp_NewYorkNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember | [5]
Lease in-place Value | 8,426 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_NewYorkNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember | 77,065 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_NewYorkNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember | [5]
Number of real estate properties | 3 us-gaap_NumberOfRealEstateProperties / invest_InvestmentGeographicRegionAxis = lxp_NewYorkNewYorkMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember |  |
Land [Member] | Danville, Virginia [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis |  | 4,727 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_DanvilleVirginiaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember |
Land and Land Estate |  | 3,454 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_DanvilleVirginiaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember |
Building and Improvements |  | 0 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_DanvilleVirginiaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember |
Above Market Lease Value |  | 673 us-gaap_FiniteLivedIntangibleAssetOffMarketLeaseFavorableGross / invest_InvestmentGeographicRegionAxis = lxp_DanvilleVirginiaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember |
Lease in-place Value |  | 600 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_DanvilleVirginiaMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = us-gaap_LandMember |
Rehabilitation Hospital [Member] | Vineland, New Jersey [Member] |  |  |
Investments in Real Estate and Real Estate Under Construction [Line Items] |  |  |
Initial Cost Basis | 19,100 us-gaap_BusinessCombinationConsiderationTransferred1 / invest_InvestmentGeographicRegionAxis = lxp_VinelandNewJerseyMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = lxp_RehabilitationHospitalMember |  |
Land and Land Estate | 2,698 lxp_LandAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_VinelandNewJerseyMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = lxp_RehabilitationHospitalMember |  |
Building and Improvements | 12,790 lxp_InvestmentBuildingAndBuildingImprovementsAcquiredDuringPeriod / invest_InvestmentGeographicRegionAxis = lxp_VinelandNewJerseyMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = lxp_RehabilitationHospitalMember |  |
Lease in-place Value | $ 3,612 us-gaap_FiniteLivedIntangibleAssetAcquiredInPlaceLeases / invest_InvestmentGeographicRegionAxis = lxp_VinelandNewJerseyMember / us-gaap_MortgageLoansOnRealEstateDescriptionTypeOfPropertyAxis = lxp_RehabilitationHospitalMember |  |
[1] | The Company incurred additional tenant related costs of $3,825.
[2] | Includes four properties. One property was under construction at December 31, 2013, $1,969 of construction in progress costs are included in building and improvements above.
[3] | The Company incurred leasing costs of $323. The property was sold in September 2013.
[4] | The Company incurred leasing costs of $338.
[5] | Includes three properties.

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16265-109275 + Details
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- Definition Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6578-128477 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=6911251&loc=d3e6613-128477 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=35744584&loc=d3e6927-128479 + Details
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- Definition The current amount of expenditures for a real estate project that has not yet been completed. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.10) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition This element represents the amount of value allocated by a lessor (acquirer) to lease agreements which exist at acquisition of a leased property. Such amount may include the value assigned to existing tenant relationships and excludes the market adjustment component of the value assigned for above or below-market leases acquired. + References No definition available. + Details
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- Definition This element represents the identifiable intangible asset established upon acquisition based on a favorable difference between the terms of an acquired lease and the current market terms for that lease at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.15) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
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- Definition Amount of cash outflow for costs that are essential to originate the lease and would not otherwise have been incurred without the lease agreement. Amount includes, but is not limited to, cash outflows to evaluate the lessee's credit condition, guarantees, and collateral and cash outflows for costs incurred in negotiating, processing, and executing the lease agreement. + References No definition available. + Details
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- Definition Amount of cash outflow for the allowance granted to lessee and/or direct costs incurred by lessor used to prepare the leased premises for tenant's occupancy. + References No definition available. + Details
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