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The Company and Financial Statement Presentation (Details) | Mar. 31, 2013 states properties
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The Company and Financial Statement Presentation [Abstract] |
Number of Consolidated Properties | 220
Number of States in which Entity has Interests | 41

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- Details
Name: | lxp_CompanyAndFinancialStatementPresentationAbstract
Namespace Prefix: | lxp_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition The number of real estate properties owned as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfRealEstateProperties
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition The number of states the entity operates in as of the balance sheet date. + References No definition available. + Details
Name: | us-gaap_NumberOfStatesInWhichEntityOperates
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant