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Sales of Real Estate and Discontinued Operations (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2013 properties | Dec. 31, 2012 properties | Dec. 31, 2011
Discontinued Operations and Disposal Groups [Abstract] |  |  |
Aggregate gross disposition price | $ 75,519 | $ 142,022 | $ 124,039
Aggregate Gain on Sales of Properties | 24,472 | 13,291 | 6,557
Debt satisfaction gains (charges), net | 8,955 | (178) | (606)
Properties classified as held-for-sale (in # of properties) | 0 | 0 |
Total gross revenues | 7,577 | 22,591 | 44,247
Pre-tax net income (loss), including gains on sales | $ 19,746 | $ 1,807 | $ (87,533)

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- Definition Amount represents the difference between the fair value of the payments made and the carrying amount of the debt at the time of its extinguishment for assets classifed in discontinued operations. + References No definition available. + Details
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Namespace Prefix: | lxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Real Estate Disposition Price + References No definition available. + Details
Name: | lxp_RealEstateDispositionPrice
Namespace Prefix: | lxp_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Real Estate Properties Held For Sale + References No definition available. + Details
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Namespace Prefix: | lxp_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Details
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Balance Type: | na
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- Definition Amount of operating income or loss attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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Balance Type: | credit
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- Definition Amount of sales or other form of revenues attributable to the disposal group, including a component of the entity (discontinued operation), during the reporting period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 205 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6360339&loc=d3e1361-107760 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition The difference between the carrying value and the sale price of real estate or properties that were intended to be sold or held for capital appreciation or rental income. This element refers to the gain (loss) included in earnings and not to the cash proceeds of the sale. This element is a noncash adjustment to net income when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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