XML 23 R1.htm IDEA: XBRL DOCUMENT v3.8.0.1
Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2017
Feb. 22, 2018
Jun. 30, 2017
Entity Information [Line Items]      
Entity Registrant Name LEXINGTON REALTY TRUST    
Entity Central Index Key 0000910108    
Current Fiscal Year End Date --12-31    
Entity Well-known Seasoned User Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Large Accelerated Filer    
Entity Public Float     $ 2,328,797,004
Entity Common Stock, Shares Outstanding (in shares)   240,767,878  
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Document Type 10-K    
Amendment Flag false    
Document Period Ended Date Dec. 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 Well-known Seasoned User Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Filer Category Non-accelerated Filer    
Entity Public Float     $ 0
Entity Common Stock, Shares Outstanding (in shares)   0  
Document Fiscal Year Focus 2017    
Document Fiscal Period Focus FY    
Document Type 10-K    
Amendment Flag false    
Document Period Ended Date Dec. 31, 2017