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		9 Months Ended
	May 31, 2021	May 31, 2020	May 31, 2021	May 31, 2020
EARNINGS PER SHARE [Abstract]
Net income attributable to PriceSmart, Inc.	$ 22,529	$ 12,705	$ 78,502	$ 58,033
Less: Allocation of income to unvested stockholders	(372)	(188)	(952)	(527)
Net income attributable to PriceSmart, Inc. per share available for distribution	$ 22,157	$ 12,517	$ 77,550	$ 57,506
Basic weighted average shares outstanding	30,414	30,271	30,396	30,268
Add dilutive effect of performance stock units (two-class method)	32	4	27	5
Diluted average shares outstanding	30,446	30,275	30,423	30,273
Basic net income per share	$ 0.73	$ 0.41	$ 2.55	$ 1.90
Diluted net income per share	$ 0.73	$ 0.41	$ 2.55	$ 1.90