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, 2018		Nov. 30, 2017
EARNINGS PER SHARE [Abstract]
Net income (loss) attributable to PriceSmart Inc.	$ 14,612	[1]	$ 22,490
Less: Allocation of income to unvested stockholders	(193)		(300)
Net income attributable to PriceSmart, Inc. per share available for distribution:	$ 14,419		$ 22,190
Basic weighted average shares outstanding	30,172		30,078
Add dilutive effect of performance stock units (two-class method)	17		1
Diluted average shares outstanding	30,189		30,079
Basic net income per share	$ 0.48		$ 0.74
Diluted net income per share	$ 0.48		$ 0.74

[1] In March 2018, the Company acquired Aeropost, Inc. During the three months ended November 30, 2018, the consolidated net income attributable to PriceSmart Inc. contained approximately $3.9 million costs associated with Aeropost and omni-channel development initiatives.