SEGMENT REPORTING - Reconciliation of Segment Profit to Net Income Attributable to Stockholders (Details) - USD ($) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting [Abstract]
Total segments’ profit	$ 69,924		$ 67,015		$ 138,541	$ 132,911
General and administrative	(8,609)		(7,612)		(17,608)	(14,754)
Depreciation and amortization	(29,823)		(31,087)		(59,724)	(61,499)
Interest expense, net	(16,368)		(14,547)		(32,097)	(29,213)
Other income (expense), net	273		(181)		6,951	(343)
NET INCOME	15,397	$ 20,666	13,588	$ 13,514	36,063	27,102
Net income attributable to restricted shares	(190)		(154)		(379)	(309)
Net income attributable to unitholders in the Operating Partnership	(3,224)		(2,852)		(7,565)	(5,688)
Net income attributable to American Assets Trust, Inc. stockholders	$ 11,983		$ 10,582		$ 28,119	$ 21,105