Consolidated Balance Sheets - LP (Parenthetical) - American Assets Trust, L.P. - shares	Sep. 30, 2022	Dec. 31, 2021
Limited partners' capital, units outstanding (in shares)	16,181,537	16,181,537
Limited partners' capital, units issued (in shares)	16,181,537	16,181,537
General partners' capital, units issued (in shares)	60,528,115	60,525,580
General partners' capital, units outstanding (in shares)	60,528,115	60,525,580