Document and Entity Information - shares	3 Months Ended
	Mar. 31, 2017	May 08, 2017
Entity Information [Line Items]
Entity Registrant Name	LEXINGTON REALTY TRUST
Entity Central Index Key	0000910108
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		240,400,480
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Document Type	10-Q
Amendment Flag	false
Document Period Ended Date	Mar. 31, 2017
LCIF [Member]
Entity Information [Line Items]
Entity Registrant Name	LEPERCQ CORPORATE INCOME FUND L.P.
Entity Central Index Key	0000790877
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		0
Document Fiscal Year Focus	2017
Document Fiscal Period Focus	Q1
Document Type	10-Q
Amendment Flag	false
Document Period Ended Date	Mar. 31, 2017