Consolidated Balance Sheets - LP (Parenthetical) - American Assets Trust, L.P. - shares	Sep. 30, 2023	Dec. 31, 2022
Limited partners' capital, units issued (in shares)	16,181,537	16,181,537
Limited partners' capital, units outstanding (in shares)	16,181,537	16,181,537
General partners' capital, units issued (in shares)	60,724,630	60,718,653
General partners' capital, units outstanding (in shares)	60,724,630	60,718,653