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, 2019	Nov. 30, 2018
EARNINGS PER SHARE [Abstract]
Net income attributable to PriceSmart, Inc.	$ 19,728	$ 14,612
Less: Allocation of income to unvested stockholders	(258)	(193)
Net income attributable to PriceSmart, Inc. per share available for distribution	$ 19,470	$ 14,419
Basic weighted average shares outstanding	30,277	30,172
Add dilutive effect of performance stock units (two-class method)	7	17
Diluted average shares outstanding	30,284	30,189
Basic net income per share	$ 0.64	$ 0.48
Diluted net income per share	$ 0.64	$ 0.48