XML 16 R1.htm IDEA: XBRL DOCUMENT v3.19.1
Document and Entity Information Document - shares
 3 Months Ended
Mar. 31, 2019
Apr. 26, 2019
Document Information [Line Items]    
Entity Registrant Name BRANDYWINE REALTY TRUST  
Trading Symbol BDN  
Entity Central Index Key 0000790816  
Current Fiscal Year End Date --12-31  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Document Type 10-Q  
Document Period End Date Mar. 31, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Entity Common Stock, Shares Outstanding   176,137,761
BRANDYWINE OPERATING PARTNERSHIP, L.P.    
Document Information [Line Items]    
Entity Registrant Name BRANDYWINE OPERATING PARTNERSHIP, L.P.  
Entity Central Index Key 0001060386  
Current Fiscal Year End Date --12-31  
Entity Filer Category Non-accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Document Type 10-Q  
Document Period End Date Mar. 31, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q1  
Amendment Flag false