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, 2020	May 31, 2019	May 31, 2020	May 31, 2019
EARNINGS PER SHARE [Abstract]
Net income attributable to PriceSmart, Inc.	$ 12,705	$ 14,096	$ 58,033	$ 52,518
Less: Allocation of income to unvested stockholders	(188)	(189)	(527)	(414)
Net income attributable to PriceSmart, Inc. per share available for distribution	$ 12,517	$ 13,907	$ 57,506	$ 52,104
Basic weighted average shares outstanding	30,271	30,198	30,268	30,192
Add dilutive effect of performance stock units (two-class method)	4	7	5	10
Diluted average shares outstanding	30,275	30,205	30,273	30,202
Basic net income per share	$ 0.41	$ 0.46	$ 1.90	$ 1.73
Diluted net income per share	$ 0.41	$ 0.46	$ 1.90	$ 1.73