EARNINGS PER SHARE (Schedule of the Computation of Net Income Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Nov. 30, 2020	Nov. 30, 2019
EARNINGS PER SHARE [Abstract]
Net income attributable to PriceSmart, Inc.	$ 27,737	$ 19,728
Less: Allocation of income to unvested stockholders	(459)	(258)
Net income attributable to PriceSmart, Inc. per share available for distribution	$ 27,278	$ 19,470
Basic weighted average shares outstanding	30,398	30,277
Add dilutive effect of performance stock units (two-class method)	22	7
Diluted average shares outstanding	30,420	30,284
Basic net income per share	$ 0.90	$ 0.64
Diluted net income per share	$ 0.90	$ 0.64