EQUITY OF AMERICAN ASSETS TRUST, INC. - Dividends Declare and Paid on Shares on Common Stock and Noncontrolling Common Units (Details)	3 Months Ended
	Mar. 31, 2018 $ / shares
Equity [Abstract]
Dividends period	First Quarter 2018
Amount per Share/Unit (in USD per unit)	$ 0.27
Date dividend to be paid	Mar. 29, 2018