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| | | <Role> http://www.lxp.com/role/EarningsPerShareDetails </Role> |
| | | <ShortName> Earnings Per Share (Details) </ShortName> |
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| | | <ShortName> Investments in Real Estate and Real Estate Under Construction (Details) </ShortName> |
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| | | <ShortName> Impairment of Real Estate (Details) </ShortName> |
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| | | <ShortName> Loans Receivable (Details) </ShortName> |
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| | | <ShortName> Fair Value Measurements (Details) </ShortName> |
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| | | <ShortName> Fair Value Measurements (Details 2) </ShortName> |
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| | <Report> |
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| | | <ShortName> Investment in and Advances to Non-Consolidated Entities (Details) </ShortName> |
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| | <Report> |
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| | | <ReportType> Notes </ReportType> |
| | | <Role> http://www.lxp.com/role/MortgagesAndNotesPayableDetails </Role> |
| | | <ShortName> Mortgages and Notes Payable (Details) </ShortName> |
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| | <Report> |
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| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
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| | | <LongName> 2411402 - Disclosure - Senior Notes, Convertible Notes, Exchangeable Notes and Trust Preferred Securities (Details) </LongName> |
| | | <ReportType> Notes </ReportType> |
| | | <Role> http://www.lxp.com/role/SeniorNotesConvertibleNotesExchangeableNotesAndTrustPreferredSecuritiesDetails </Role> |
| | | <ShortName> Senior Notes, Convertible Notes, Exchangeable Notes and Trust Preferred Securities (Details) </ShortName> |
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| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/DerivativesAndHedgingActivitiesDetails </Role> |
| | | <ShortName> Derivatives and Hedging Activities (Details) </ShortName> |
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| | <Report> |
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| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
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| | | <Role> http://www.lxp.com/role/LeasesDetails </Role> |
| | | <ShortName> Leases (Details) </ShortName> |
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| | <Report> |
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| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R60.htm </HtmlFileName> |
| | | <LongName> 2414401 - Disclosure - Concentration of Risk (Details) </LongName> |
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| | | <Role> http://www.lxp.com/role/ConcentrationOfRiskDetails </Role> |
| | | <ShortName> Concentration of Risk (Details) </ShortName> |
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| | <Report> |
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| | | <Role> http://www.lxp.com/role/EquityDetails </Role> |
| | | <ShortName> Equity (Details) </ShortName> |
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| | <Report> |
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| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R62.htm </HtmlFileName> |
| | | <LongName> 2415403 - Disclosure - Equity Stock Redeemed and Retired (Details) </LongName> |
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| | | <Role> http://www.lxp.com/role/EquityStockRedeemedAndRetiredDetails </Role> |
| | | <ShortName> Equity Stock Redeemed and Retired (Details) </ShortName> |
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| | <Report> |
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| | | <HtmlFileName> R63.htm </HtmlFileName> |
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| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/BenefitPlansDetails </Role> |
| | | <ShortName> Benefit Plans (Details) </ShortName> |
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| | <Report> |
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| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R64.htm </HtmlFileName> |
| | | <LongName> 2416403 - Disclosure - Benefit Plans Assumptions Used (Details) </LongName> |
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| | | <Role> http://www.lxp.com/role/BenefitPlansAssumptionsUsedDetails </Role> |
| | | <ShortName> Benefit Plans Assumptions Used (Details) </ShortName> |
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| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R65.htm </HtmlFileName> |
| | | <LongName> 2416404 - Disclosure - Benefit Plans Share Option Activity (Details) </LongName> |
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| | | <Role> http://www.lxp.com/role/BenefitPlansShareOptionActivityDetails </Role> |
| | | <ShortName> Benefit Plans Share Option Activity (Details) </ShortName> |
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| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R66.htm </HtmlFileName> |
| | | <LongName> 2416405 - Disclosure - Benefit Plans Non-Vested Share Activity (Details) </LongName> |
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| | | <Role> http://www.lxp.com/role/BenefitPlansNonVestedShareActivityDetails </Role> |
| | | <ShortName> Benefit Plans Non-Vested Share Activity (Details) </ShortName> |
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| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R67.htm </HtmlFileName> |
| | | <LongName> 2417401 - Disclosure - Related Party Transactions (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/RelatedPartyTransactionsDetails </Role> |
| | | <ShortName> Related Party Transactions (Details) </ShortName> |
| | | </Report> |
| | <Report> |
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| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R68.htm </HtmlFileName> |
| | | <LongName> 2418402 - Disclosure - Income Taxes (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/IncomeTaxesDetails </Role> |
| | | <ShortName> Income Taxes (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R69.htm </HtmlFileName> |
| | | <LongName> 2418403 - Disclosure - Income Taxes Components of Income Tax Provision (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/IncomeTaxesComponentsOfIncomeTaxProvisionDetails </Role> |
| | | <ShortName> Income Taxes Components of Income Tax Provision (Details) </ShortName> |
| | | </Report> |
| | <Report> |
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| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R70.htm </HtmlFileName> |
| | | <LongName> 2418404 - Disclosure - Income Taxes Statutory Federal Income Tax (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/IncomeTaxesStatutoryFederalIncomeTaxDetails </Role> |
| | | <ShortName> Income Taxes Statutory Federal Income Tax (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R71.htm </HtmlFileName> |
| | | <LongName> 2418405 - Disclosure - Income Taxes Summary of the Average Taxable Nature of Dividends (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/IncomeTaxesSummaryOfAverageTaxableNatureOfDividendsDetails </Role> |
| | | <ShortName> Income Taxes Summary of the Average Taxable Nature of Dividends (Details) </ShortName> |
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| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R72.htm </HtmlFileName> |
| | | <LongName> 2419401 - Disclosure - Commitments and Contingencies (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/CommitmentsAndContingenciesDetails </Role> |
| | | <ShortName> Commitments and Contingencies (Details) </ShortName> |
| | | </Report> |
| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R73.htm </HtmlFileName> |
| | | <LongName> 2420401 - Disclosure - Supplemental Disclosure of Statement of Cash Flow Information Noncash Acquisitions (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/SupplementalDisclosureOfStatementOfCashFlowInformationNoncashAcquisitionsDetails </Role> |
| | | <ShortName> Supplemental Disclosure of Statement of Cash Flow Information Noncash Acquisitions (Details) </ShortName> |
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| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R74.htm </HtmlFileName> |
| | | <LongName> 2420402 - Disclosure - Supplemental Disclosure of Statement of Cash Flow Information Other Noncash Transactions (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/SupplementalDisclosureOfStatementOfCashFlowInformationOtherNoncashTransactionsDetails </Role> |
| | | <ShortName> Supplemental Disclosure of Statement of Cash Flow Information Other Noncash Transactions (Details) </ShortName> |
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| | | <IsDefault> false </IsDefault> |
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| | | <LongName> 2421402 - Disclosure - Unaudited Quarterly Financial Data (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/UnauditedQuarterlyFinancialDataDetails </Role> |
| | | <ShortName> Unaudited Quarterly Financial Data (Details) </ShortName> |
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| | | <LongName> 2422401 - Disclosure - Subsequent Events (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/SubsequentEventsDetails </Role> |
| | | <ShortName> Subsequent Events (Details) </ShortName> |
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| | <Report> |
| | | <IsDefault> false </IsDefault> |
| | | <HasEmbeddedReports> false </HasEmbeddedReports> |
| | | <HtmlFileName> R77.htm </HtmlFileName> |
| | | <LongName> 2423401 - Schedule - Schedule III - Real Estate and Accumulated Depreciation and Amortization (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/ScheduleIiiRealEstateAndAccumulatedDepreciationAndAmortizationDetails </Role> |
| | | <ShortName> Schedule III - Real Estate and Accumulated Depreciation and Amortization (Details) </ShortName> |
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| | | <LongName> 2423402 - Schedule - Schedule III - Real Estate and Accumulated Depreciation and Amortization Summary (Details) </LongName> |
| | | <ReportType> Sheet </ReportType> |
| | | <Role> http://www.lxp.com/role/ScheduleIiiRealEstateAndAccumulatedDepreciationAndAmortizationSummaryDetails </Role> |
| | | <ShortName> Schedule III - Real Estate and Accumulated Depreciation and Amortization Summary (Details) </ShortName> |
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| | <Report> |
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| | | <LongName> All Reports </LongName> |
| | | <ReportType> Book </ReportType> |
| | | <ShortName> All Reports </ShortName> |
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| | </MyReports> |
| <Logs> |
| | <Log type="Info"> Element lxp_AllocationOfDividendPayments had a mix of decimals attribute values: 5 6. </Log> |
| | <Log type="Info"> Element lxp_TaxablePercentageAllocationOnDividends had a mix of decimals attribute values: 0 4. </Log> |
| | <Log type="Info"> Element us-gaap_AreaOfRealEstateProperty had a mix of decimals attribute values: -5 0. </Log> |
| | <Log type="Info"> Element us-gaap_CommonStockDividendsPerShareDeclared had a mix of decimals attribute values: 2 3. </Log> |
| | <Log type="Info"> Element us-gaap_DebtWeightedAverageInterestRate had a mix of decimals attribute values: 3 4. </Log> |
| | <Log type="Info"> Element us-gaap_EquityMethodInvestmentOwnershipPercentage had a mix of decimals attribute values: 2 3. </Log> |
| | <Log type="Info"> Element us-gaap_OperatingLossCarryforwards had a mix of decimals attribute values: -3 0. </Log> |
| | <Log type="Info"> Element us-gaap_PreferredStockDividendsPerShareDeclared had a mix of decimals attribute values: 4 5 6. </Log> |
| | <Log type="Info"> Element us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice had a mix of decimals attribute values: 0 2. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2404402 - Disclosure - Investments in Real Estate and Real Estate Under Construction (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2409401 - Disclosure - Investment in and Advances to Non-Consolidated Entities (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2410402 - Disclosure - Mortgages and Notes Payable (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2411402 - Disclosure - Senior Notes, Convertible Notes, Exchangeable Notes and Trust Preferred Securities (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2415402 - Disclosure - Equity (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2416402 - Disclosure - Benefit Plans (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2418402 - Disclosure - Income Taxes (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2423401 - Schedule - Schedule III - Real Estate and Accumulated Depreciation and Amortization (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> 'Monetary' elements on report '2423402 - Schedule - Schedule III - Real Estate and Accumulated Depreciation and Amortization Summary (Details)' had a mix of different decimal attribute values. </Log> |
| | <Log type="Info"> Process Flow-Through: 1001000 - Statement - CONSOLIDATED BALANCE SHEETS </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column 'Dec. 31, 2011' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column 'Dec. 31, 2010' </Log> |
| | <Log type="Info"> Process Flow-Through: 1001501 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) </Log> |
| | <Log type="Info"> Process Flow-Through: 1002000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2013' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2013' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2013' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2013' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2012' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2012' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2012' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2012' </Log> |
| | <Log type="Info"> Process Flow-Through: 1004000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2013' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2013' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2013' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2013' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Dec. 31, 2012' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Sep. 30, 2012' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Jun. 30, 2012' </Log> |
| | <Log type="Info"> Process Flow-Through: Removing column '3 Months Ended Mar. 31, 2012' </Log> |
| | <Log type="Info"> Process Flow-Through: 1006000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS </Log> |
| | <Log type="Info"> Process Flow-Through: 1006001 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS CONSOLIDATED STATEMENTS OF CASH FLOWS (Parenthetical) </Log> |
| | </Logs> |
| <InputFiles> |
| | <File> lxp-20131231.xml </File> |
| | <File> lxp-20131231.xsd </File> |
| | <File> lxp-20131231_cal.xml </File> |
| | <File> lxp-20131231_def.xml </File> |
| | <File> lxp-20131231_lab.xml </File> |
| | <File> lxp-20131231_pre.xml </File> |
| | </InputFiles> |
| <SupplementalFiles/> |
| <BaseTaxonomies/> |
| <HasPresentationLinkbase> true </HasPresentationLinkbase> |
| <HasCalculationLinkbase> true </HasCalculationLinkbase> |
| </FilingSummary> |