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COMPANY OVERVIEW AND BASIS OF PRESENTATION (Details)
Nov. 30, 2014
Club
Company Overview [Line Items]  
Number of stores 36us-gaap_NumberOfStores
Foreign Countries  
Company Overview [Line Items]  
Number of countries 12us-gaap_NumberOfCountriesInWhichEntityOperates
/ dei_EntityByLocationAxis
= psmt_ForeignCountriesMember
Costa Rica  
Company Overview [Line Items]  
Number of stores 6us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= psmt_CostaRicaMember
Panama  
Company Overview [Line Items]  
Number of stores 4us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= psmt_PanamaMember
Trinidad  
Company Overview [Line Items]  
Number of stores 4us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= country_TT
Guatemala  
Company Overview [Line Items]  
Number of stores 3us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= country_GT
Dominican Republic  
Company Overview [Line Items]  
Number of stores 3us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= country_DO
EL SALVADOR  
Company Overview [Line Items]  
Number of stores 2us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= country_SV
HONDURAS  
Company Overview [Line Items]  
Number of stores 3us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= country_HN
COLOMBIA  
Company Overview [Line Items]  
Number of stores 6us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= country_CO
Aruba  
Company Overview [Line Items]  
Number of stores 1us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= country_AW
Barbados  
Company Overview [Line Items]  
Number of stores 1us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= country_BB
Jamaica  
Company Overview [Line Items]  
Number of stores 1us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= country_JM
Nicaragua  
Company Overview [Line Items]  
Number of stores 1us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= country_NI
Domestic Territories  
Company Overview [Line Items]  
Number of countries 1us-gaap_NumberOfCountriesInWhichEntityOperates
/ dei_EntityByLocationAxis
= psmt_DomesticTerritoriesMember
United States Virgin Islands  
Company Overview [Line Items]  
Number of stores 1us-gaap_NumberOfStores
/ dei_EntityByLocationAxis
= country_VI