Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information Document

v3.10.0.1
Document and Entity Information Document - shares
6 Months Ended
Jun. 30, 2018
Jul. 31, 2018
Entity Information [Line Items]    
Entity Registrant Name LIBERTY PROPERTY TRUST  
Entity Central Index Key 0000921112  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Document Type 10-Q  
Document Period End Date Jun. 30, 2018  
Document Fiscal Year Focus 2018  
Document Fiscal Period Focus Q2  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   147,812,960
Liberty Property Limited Partnership [Member]    
Entity Information [Line Items]    
Entity Registrant Name LIBERTY PROPERTY LIMITED PARTNERSHIP  
Entity Central Index Key 0000921113