SEGMENT REPORTING - Reconciliation of Segment Profit to Net Income Attributable to Stockholders (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Segment Reporting [Abstract]
Total segments’ profit	$ 65,896	$ 54,386
General and administrative	(7,142)	(6,823)
Depreciation and amortization	(30,412)	(27,501)
Interest expense	(14,666)	(14,005)
Loss on early extinguishment of debt	0	(4,271)
Other (expense) income, net	(162)	(53)
NET INCOME	13,514	1,733
Net income attributable to restricted shares	(155)	(137)
Net income attributable to unitholders in the Operating Partnership	(2,836)	(339)
Net income attributable to American Assets Trust, Inc. stockholders	$ 10,523	$ 1,257