v3.19.3
Document and Entity Information - shares
9 Months Ended
Sep. 30, 2019
Oct. 25, 2019
Entity Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2019  
Document Transition Report false  
Entity File Number 1-13102  
Entity Registrant Name FIRST INDUSTRIAL REALTY TRUST, INC.  
Entity Incorporation, State or Country Code MD  
Entity Tax Identification Number 36-3935116  
Entity Address, Address Line One 1 N. Wacker Drive, Suite 4200  
Entity Address, City or Town Chicago  
Entity Address, State or Province IL  
Entity Address, Postal Zip Code 60606  
City Area Code 312  
Local Phone Number 344-4300  
Title of 12(b) Security Common Stock, par value $.01 per share  
Trading Symbol FR  
Security Exchange Name NYSE  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Shell Company false  
Amendment Flag false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0000921825  
Current Fiscal Year End Date --12-31  
Entity Common Stock, Shares Outstanding   126,951,714
First Industrial, L.P.    
Entity Information [Line Items]    
Document Type 10-Q  
Document Period End Date Sep. 30, 2019  
Entity File Number 333-21873  
Entity Registrant Name FIRST INDUSTRIAL, L.P.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 36-3924586  
Trading Symbol FRFI  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Accelerated Filer  
Entity Emerging Growth Company false  
Entity Small Business false  
Entity Shell Company false  
Amendment Flag false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Central Index Key 0001033128  
Current Fiscal Year End Date --12-31