EQUITY OF AMERICAN ASSETS TRUST, INC. - Dividends Declare and Paid on Shares on Common Stock and Noncontrolling Common Units (Details) - $ / shares	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019
Equity [Abstract]
Dividends period	Third Quarter 2019	Second Quarter 2019	First Quarter 2019
Amount per Share/Unit (in USD per unit)	$ 0.28	$ 0.28	$ 0.28
Date dividend to be paid	Sep. 26, 2019	Jun. 27, 2019	Mar. 28, 2019