v3.19.2
Cover Page
Jun. 20, 2019
Document Information [Line Items]  
Amendment Flag true
Entity Central Index Key 0001500217
Amendment Description Amendment Description
Document Type 8-K/A
Document Period End Date Jun. 20, 2019
Entity Registrant Name American Assets Trust, Inc.
Entity Incorporation, State or Country Code MD
Entity File Number 001-35030
Entity Tax Identification Number 27-3338708
Entity Address, Address Line One 11455 El Camino Real, Suite 200
Entity Address, City or Town San Diego
Entity Address, State or Province CA
Entity Address, Postal Zip Code 92130
City Area Code 858
Local Phone Number 350-2600
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Title of 12(b) Security Common Stock, par value $0.01 per share
Trading Symbol AAT
Security Exchange Name NYSE
Entity Emerging Growth Company false
American Assets Trust, L.P.  
Document Information [Line Items]  
Entity Central Index Key 0001509570
Entity Registrant Name American Assets Trust, L.P.
Entity Incorporation, State or Country Code MD
Entity File Number 333-202342-01
Entity Tax Identification Number 27-3338894