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, 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		36,063	36,063
Other comprehensive income (loss) - change in value of interest rate swaps		2,091	2,091
Reclassification of amortization of forward-starting swap included in interest expense		(952)	(952)
Ending partners' capital account (in shares) at Jun. 30, 2023					16,181,537		60,724,630	[2]
Ending partners' capital account at Jun. 30, 2023			1,176,116	15,150	$ (42,242)		$ 1,203,208	[2]
Beginning partners' capital account (in shares) at Mar. 31, 2023					16,181,537		60,717,835	[2]
Beginning partners' capital account at Mar. 31, 2023			1,179,726	10,888	$ (40,126)		$ 1,208,964	[2]
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income		15,397	15,397		3,224		$ 12,173	[2]
Issuance of restricted stock (in shares)	[2]						10,348
Forfeiture of restricted units (in shares)	[2]						(3,553)
Distributions			(25,379)		$ (5,340)		$ (20,039)	[2]
Stock-based compensation			2,110				$ 2,110	[2]
Other comprehensive income (loss) - change in value of interest rate swaps		4,360	4,360	4,360
Reclassification of amortization of forward-starting swap included in interest expense		(98)	(98)	(98)
Ending partners' capital account (in shares) at Jun. 30, 2023					16,181,537		60,724,630	[2]
Ending partners' capital account at Jun. 30, 2023			1,176,116	15,150	$ (42,242)		$ 1,203,208	[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]
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		39,917	39,917
Other comprehensive income (loss) - change in value of interest rate swaps		542	542
Reclassification of amortization of forward-starting swap included in interest expense		(197)	(197)
Ending partners' capital account (in shares) at Jun. 30, 2024					16,181,537		60,901,583	[2]
Ending partners' capital account at Jun. 30, 2024			1,145,656	11,380	$ (49,416)		$ 1,183,692	[2]
Beginning partners' capital account (in shares) at Mar. 31, 2024					16,181,537		60,894,491	[2]
Beginning partners' capital account at Mar. 31, 2024			1,155,388	12,329	$ (47,190)		$ 1,190,249	[2]
Increase (Decrease) in Partners' Capital [Roll Forward]
Net income		15,294	15,294		3,195		$ 12,099	[2]
Issuance of restricted stock (in shares)	[2]						9,180
Forfeiture of restricted units (in shares)	[2]						(2,088)
Distributions			(25,823)		$ (5,421)		$ (20,402)	[2]
Stock-based compensation			1,746				$ 1,746	[2]
Other comprehensive income (loss) - change in value of interest rate swaps		(850)	(850)	(850)
Reclassification of amortization of forward-starting swap included in interest expense		$ (99)	(99)	(99)
Ending partners' capital account (in shares) at Jun. 30, 2024					16,181,537		60,901,583	[2]
Ending partners' capital account at Jun. 30, 2024			$ 1,145,656	$ 11,380	$ (49,416)		$ 1,183,692	[2]

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

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