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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Principles of Consolidation (Details)
Feb. 28, 2015
Equity Method Investment, Ownership Percentage 100.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
GolfPark Plaza, S.A [Member] | PANAMA  
Equity Method Investment, Ownership Percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= psmt_GolfparkPlazaSAMember
/ us-gaap_StatementGeographicalAxis
= country_PA		 [1]
Price Plaza Alajuela PPA, S.A [Member] | COSTA RICA  
Equity Method Investment, Ownership Percentage 50.00%us-gaap_EquityMethodInvestmentOwnershipPercentage
/ dei_LegalEntityAxis
= psmt_PricePlazaAlajuelaPpaSAMember
/ us-gaap_StatementGeographicalAxis
= country_CR		 [1]
[1] Joint venture interests are recorded as investment in unconsolidated affiliates on the consolidated balance sheets.