EQUITY OF AMERICAN ASSETS TRUST, INC. - Dividends Declare and Paid on Shares on Common Stock and Noncontrolling Common Units (Details) - $ / shares	3 Months Ended
	Jun. 30, 2015	Mar. 31, 2015
Equity [Abstract]
Dividends Period	Second Quarter 2015	First Quarter 2015
Amount per Share/Unit	$ 0.2325	$ 0.2325
Dividends Period Covered	April 1, 2015 to June 30, 2015	January 1, 2015 to March 31, 2015
Dividends Payable, Date to be Paid	Jun. 26, 2015	Mar. 27, 2015