SEGMENT REPORTING - Reconciliation of Segment Profit to Net Income Attributable to Stockholders (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting [Abstract]
Total segments’ profit	$ 70,542		$ 69,924		$ 140,150	$ 138,541
General and administrative	(8,737)		(8,609)		(17,579)	(17,608)
Depreciation and amortization	(31,011)		(29,823)		(61,228)	(59,724)
Interest expense, net	(16,289)		(16,368)		(32,544)	(32,097)
Other income (expense), net	789		273		11,118	6,951
NET INCOME	15,294	$ 24,623	15,397	$ 20,666	39,917	36,063
Net income attributable to restricted shares	(195)		(190)		(391)	(379)
Net income attributable to unitholders in the Operating Partnership	(3,195)		(3,224)		(8,362)	(7,565)
NET INCOME ATTRIBUTABLE TO AMERICAN ASSETS TRUST, INC. STOCKHOLDERS	$ 11,904		$ 11,983		$ 31,164	$ 28,119