Consolidated Statement of Partners' Capital - LP - USD ($) $ in Thousands		Total	American Assets Trust, L.P.	American Assets Trust, L.P. Accumulated Other Comprehensive Income (Loss)	American Assets Trust, L.P. Limited Partners' Capital	[1]	American Assets Trust, L.P. General Partner's Capital
Beginning partners' capital account (in shares) at Dec. 31, 2022					16,181,537		60,718,653	[2]
Beginning partners' capital account at Dec. 31, 2022			$ 1,185,525	$ 14,011	$ (39,127)		$ 1,210,641	[2]
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income		$ 20,666	20,666		4,341		$ 16,325	[2]
Forfeiture of restricted units (in shares)	[2]						(818)
Distributions			(25,377)		$ (5,340)		$ (20,037)	[2]
Stock-based compensation			2,035				$ 2,035	[2]
Other comprehensive income (loss) - change in value of interest rate swaps		(2,269)	(2,269)	(2,269)
Reclassification of amortization of forward-starting swap included in interest expense		(854)	(854)	(854)
Ending partners' capital account (in shares) at Mar. 31, 2023					16,181,537		60,717,835	[2]
Ending partners' capital account at Mar. 31, 2023			1,179,726	10,888	$ (40,126)		$ 1,208,964	[2]
Beginning partners' capital account (in shares) at Dec. 31, 2023					16,181,537		60,895,786	[2]
Beginning partners' capital account at Dec. 31, 2023			1,153,675	11,035	$ (46,936)		$ 1,189,576	[2]
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income		24,623	24,623		5,167		$ 19,456	[2]
Forfeiture of restricted units (in shares)	[2]						(1,295)
Distributions			(25,821)		$ (5,421)		$ (20,400)	[2]
Stock-based compensation			1,617				$ 1,617	[2]
Other comprehensive income (loss) - change in value of interest rate swaps		1,392	1,392	1,392
Reclassification of amortization of forward-starting swap included in interest expense		$ (98)	(98)	(98)
Ending partners' capital account (in shares) at Mar. 31, 2024					16,181,537		60,894,491	[2]
Ending partners' capital account at Mar. 31, 2024			$ 1,155,388	$ 12,329	$ (47,190)		$ 1,190,249	[2]

[1] Consists of limited partnership interests held by third parties.

[2] Consists of general partnership interests held by American Assets Trust, Inc.