Quarterly report pursuant to Section 13 or 15(d)

Document and Entity Information Document

v3.19.2
Document and Entity Information Document - shares
6 Months Ended
Jun. 30, 2019
Jul. 30, 2019
Entity Information [Line Items]    
Title of 12(g) Security Common Shares of Beneficial Interest, $0.001 par value  
Entity Registrant Name LIBERTY PROPERTY TRUST  
Entity Tax Identification Number 23-7768996  
Entity Address, Address Line One 650 East Swedesford Road  
Entity Address, City or Town Wayne,  
Entity Address, State or Province PA  
Entity Address, Postal Zip Code 19087  
Trading Symbol LPT  
City Area Code 610  
Local Phone Number 648-1700  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Shell Company false  
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, 2019  
Entity File Number 1-13130  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q2  
Entity Emerging Growth Company false  
Entity Small Business false  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   148,426,042
Security Exchange Name NYSE  
Document Quarterly Report true  
Document Transition Report false  
Entity Incorporation, State or Country Code MD  
Liberty Property Limited Partnership    
Entity Information [Line Items]    
Entity Registrant Name LIBERTY PROPERTY LIMITED PARTNERSHIP  
Entity Tax Identification Number 23-2766549  
Entity Central Index Key 0000921113  
Entity File Number 1-13132  
Entity Incorporation, State or Country Code PA