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Commitments and Contingencies (Details) (USD $) In Thousands, unless otherwise specified | Sep. 30, 2013 Guarantee
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Commitments and Contingencies [Line Items] |
Number of Guarantees Outstanding | 3
Base Building Improvements [Member] |
Commitments and Contingencies [Line Items] |
Obligation for tenant improvements | $ 2,297
Tenant Improvement [Member] |
Commitments and Contingencies [Line Items] |
Obligation for tenant improvements | 234
Payment of the Base Building Improvement, Tenant Improvement Alloance, and Lease Commissions [Member] |
Commitments and Contingencies [Line Items] |
Obligation for tenant improvements | $ 2,114

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

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- Definition Number of Guarantees Outstanding + References No definition available. + Details
Name: | lxp_NumberofGuaranteesOutstanding
Namespace Prefix: | lxp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions. + References No definition available. + Details
Name: | us-gaap_OtherCommitment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant