v3.19.3.a.u2
Cover Page
Dec. 05, 2019
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Dec. 05, 2019
Entity Registrant Name American Assets Trust, Inc.
Entity Central Index Key 0001500217
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
Entity Address, Address Line Two 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