EARNINGS PER SHARE (Schedule of the Computation of Net Income Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Aug. 31, 2023	Aug. 31, 2022	Aug. 31, 2021
Earnings Per Share [Abstract]
Net income attributable to PriceSmart, Inc.	$ 109,205	$ 104,534	$ 97,963
Less: Allocation of income to unvested stockholders	(1,311)	(1,245)	(1,282)
Net income attributable to PriceSmart, Inc. available for distribution (in shares)	$ 107,894	$ 103,289	$ 96,681
Basic weighted average shares outstanding (in shares)	30,763,000	30,591,000	30,403,000
Add dilutive effect of performance stock units (two-class method) (in shares)	23,000	9,000	0
Diluted average shares outstanding (in shares)	30,786,000	30,600,000	30,403,000
Basic net income per share (in dollars per share)	$ 3.51	$ 3.38	$ 3.18
Diluted net income per share (in dollars per share)	$ 3.50	$ 3.38	$ 3.18