Lease Term

No definition available.

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- Definition

Real Estate Investments, Joint Ventures, Anticipated Construction Cost

+ References

No definition available.

+ Details

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- Definition

Real Estate Investments, Joint Ventures, Maximum Construction Financing

+ References

No definition available.

+ Details

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- Definition

Maximum contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(1))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

+ Details

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- Definition

Minimum contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22(a)(2))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

+ Details

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- Definition

This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 35

-Paragraph 32

-URI http://asc.fasb.org/extlink&oid=35687916&loc=d3e32787-111569

+ Details

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Balance Type:	debit
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

+ Details

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount of debt for which creditor does not have general recourse to the debtor but rather has recourse only to the property used for collateral in the transaction or other specific property.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The cash outflow associated with the purchase of or advances to an equity method investments, which are investments in joint ventures and entities in which the entity has an equity ownership interest normally of 20 to 50 percent and exercises significant influence.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

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Balance Type:	credit
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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

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- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_MortgagesMember
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- Details

Name:	dei_LegalEntityAxis=lxp_LexingtonRealtyTrustMember
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- Details

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Investment in and Advances to Non-Consolidated Entities (Details) - USD ($) $ in Thousands	1 Months Ended		9 Months Ended		12 Months Ended
	Jun. 30, 2015	Aug. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Investments in and Advances to Affiliates [Line Items]
Non-recourse debt			$ 47,763
Investment in joint venture			10,322	$ 0
Joint Venture [Member] \| Office Building [Member]
Investments in and Advances to Affiliates [Line Items]
Equity method investment, other than temporary impairment					$ 930
Oklahoma City, Oklahoma [Member] \| Tenant-in-Common [Member]
Investments in and Advances to Affiliates [Line Items]
Investment in joint venture	$ 5,613
Houston, TX [Member]
Investments in and Advances to Affiliates [Line Items]
Anticipated construction cost			86,491
Maximum construction financing			$ 56,686
Houston, TX [Member] \| Joint Venture [Member]
Investments in and Advances to Affiliates [Line Items]
Ownership percentage of equity method investment			25.00%
Lease term (years)			20 years
Baltimore, Maryland [Member] \| Joint Venture [Member]
Investments in and Advances to Affiliates [Line Items]
Investment in joint venture		$ 5,000
Lease term (years)			99 years
Mortgages [Member]
Investments in and Advances to Affiliates [Line Items]
Stated interest rate, minimum			3.70%
Stated interest rate, maximum			4.70%
Lexington Realty Trust [Member]
Investments in and Advances to Affiliates [Line Items]
Non-recourse debt			$ 8,619
Minimum [Member]
Investments in and Advances to Affiliates [Line Items]
Ownership percentage of equity method investment			15.00%
Maximum [Member]
Investments in and Advances to Affiliates [Line Items]
Ownership percentage of equity method investment			40.00%