EARNINGS PER SHARE (Schedule of the Computation of Net Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Aug. 31, 2021	Aug. 31, 2020	Aug. 31, 2019
EARNINGS PER SHARE [Abstract]
Net income attributable to PriceSmart, Inc.	$ 97,963	$ 78,109	$ 73,191
Less: Allocation of income to unvested stockholders	(1,282)	(842)	(721)
Net income attributable to PriceSmart, Inc. per share available for distribution	$ 96,681	$ 77,267	$ 72,470
Basic weighted average shares outstanding	30,403	30,259	30,195
Diluted average shares outstanding	30,403	30,259	30,195
Basic net income per share	$ 3.18	$ 2.55	$ 2.40
Diluted net income per share	$ 3.18	$ 2.55	$ 2.40