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Concentration of Risk (Details) | 12 Months Ended
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Dec. 31, 2014 tenant | Dec. 31, 2013 tenant | Dec. 31, 2012 tenant
Concentration Risk [Line Items] |  |  |
Number of tenants representing more than 10% of rental revenue | 0 lxp_NumberOfTenantsRepresentingMoreThan10PercentOfRentalRevenue | 0 lxp_NumberOfTenantsRepresentingMoreThan10PercentOfRentalRevenue | 0 lxp_NumberOfTenantsRepresentingMoreThan10PercentOfRentalRevenue
Maximum [Member] | Tenant Concentration Risk [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Concentration risk percentage | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = lxp_TenantConcentrationRiskMember / us-gaap_RangeAxis = us-gaap_MaximumMember | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = lxp_TenantConcentrationRiskMember / us-gaap_RangeAxis = us-gaap_MaximumMember | 10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByTypeAxis = lxp_TenantConcentrationRiskMember / us-gaap_RangeAxis = us-gaap_MaximumMember

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- Definition Number of Tenants Representing More Than 10 Percent of Rental Revenue + References No definition available. + Details
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- Details
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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592 + Details
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- Details
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