EQUITY OF AMERICAN ASSETS TRUST, INC. - Summary of Income Tax Status of Dividends Per Share Paid (Details) - $ / shares	3 Months Ended												12 Months Ended
	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Equity [Abstract]
Ordinary income (in USD per share)													$ 1.20	$ 1.18	$ 0.73
Capital gain (in USD per share)													0	0	0
Return of capital (in USD per share)													0.12	0.10	0.43
Total (in dollars per share)	$ 0.33	$ 0.33	$ 0.33	$ 0.33	$ 0.32	$ 0.32	$ 0.32	$ 0.32	$ 0.30	$ 0.30	$ 0.28	$ 0.28	$ 1.32	$ 1.28	$ 1.16
Ordinary income													90.60%	92.10%	62.60%
Capital gain													0.00%	0.00%	0.00%
Return of capital													9.40%	7.90%	37.40%
Total													100.00%	100.00%	100.00%