STOCKHOLDERS' EQUITY (Schedule of Components of Other Comprehensive Income (Loss) and Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Thousands		3 Months Ended		9 Months Ended			12 Months Ended
		May 31, 2022	May 31, 2021	May 31, 2022	May 31, 2021		Aug. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, Attributable to PriceSmart				$ 915,345
Other comprehensive income (loss), Attributable to PriceSmart		$ (8,735)	$ (2,557)	(10,637)	$ (457)
Balance, Attributable to PriceSmart		968,198		968,198			$ 915,345
Balance		953,884	875,251	916,214	832,732		832,732
Balance		968,198	899,784	968,198	899,784		916,214
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance, Attributable to PriceSmart				(182,508)	(176,820)		(176,820)
Other comprehensive income (loss), Attributable to PriceSmart		(8,735)	(2,590)	(10,640)	(548)
Balance, Attributable to PriceSmart		(193,148)	(177,368)	(193,148)	(177,368)		(182,508)
Balance		(184,413)	(174,778)	(182,508)	(176,820)		(176,820)
Balance		(193,148)	(177,368)	(193,148)	(177,368)		(182,508)
Foreign Currency Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), Attributable to PriceSmart				(15,119)	(2,577)		(7,837)
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), Attributable to PriceSmart	[1]			140	164		(230)
Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss), Attributable to PriceSmart				4,339	1,865	[2]	2,252	[2]
Other comprehensive income (loss)				4,339
Sale Of Aeropost [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	[2]			(254)
AOCI Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance				251	134		134
Balance			225		225		251
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)				3	91		117
Reclassification From Other Comprehensive Income (Loss) Attributable To Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amount reclassified from accumulated other comprehensive income (loss), Attributable to PriceSmart							127
AOCI Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Balance				(182,257)	(176,686)		(176,686)
Balance		$ (193,148)	$ (177,143)	(193,148)	(177,143)		(182,257)
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)				(15,116)	(2,486)		(7,720)
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	[1]			$ 140	164		(230)
Accumulated Derivative Instruments Including Portion Attributable To Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive income (loss)	[2]				$ 1,865		2,252
Reclassification From Other Comprehensive Income (Loss) Including Portion Attributable To Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Amounts reclassified from accumulated other comprehensive income (loss)							$ 127

[1] Amounts reclassified from accumulated other comprehensive income (loss) related to the minimum pension liability are included in warehouse club and other operations in the Company's consolidated statements of income.

[2] Refer to Note 8 - Derivative Instruments and Hedging Activities.