DEBT - Summary of Total Secured Notes Payable Outstanding (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Debt discount and issuance costs, net of accumulated amortization of $8,561 and $7,259, respectively	$ (971)	$ (1,295)
Accumulated amortization	1,620	1,296
Secured notes payable, net | American Assets Trust, L.P.
Debt Instrument [Line Items]
Principal Balance as of	75,000	75,000
Debt discount and issuance costs, net of accumulated amortization of $8,561 and $7,259, respectively	(286)	(331)
Total Secured Notes Payable Outstanding	74,714	74,669
Accumulated amortization	587	542
5.08% City Center Bellevue, October 2027 | Secured notes payable, net | American Assets Trust, L.P.
Debt Instrument [Line Items]
Principal Balance as of	$ 75,000	$ 75,000
Stated Interest Rate	5.08%