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Subsequent Events (Details) - Subsequent Event [Member] $ in Thousands	1 Months Ended
	May 09, 2017 USD ($) Property
Subsequent Event [Line Items]
Number of properties sold | Property	2
Proceeds from sale of real estate	$ 17,107
LCIF [Member]
Subsequent Event [Line Items]
Proceeds from sale of real estate	$ 3,461

X

- Definition

Real Estate, Number of Properties Sold

+ References

No definition available.

+ Details

Name:	lxp_RealEstateNumberofPropertiesSold
Namespace Prefix:	lxp_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Cash received for the sale of real estate that is not part of an investing activity during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 12
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	dei_LegalEntityAxis=lxp_LCIFMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: