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STOCKHOLDERS' EQUITY (Schedule of Components of Other Comprehensive Income (Loss)) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Aug. 31, 2018 | Aug. 31, 2017 | Aug. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance, Attributable to PriceSmart |  | $ 708,767 |  |
Other comprehensive income (loss), Attributable to PriceSmart |  | (11,158) | $ (6,108) | $ (2,439)
Balance, Attributable to PriceSmart |  | 758,002 | 708,767 |
Balance |  | 708,767 | 638,071 | 566,584
Other comprehensive income (loss) |  | (11,157) | (6,108) | (2,439)
Balance |  | 758,638 | 708,767 | 638,071
Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance, Attributable to PriceSmart |  | (110,059) | (103,951) | (101,512)
Other comprehensive income (loss), Attributable to PriceSmart |  | (11,157) | (6,108) | (2,439)
Balance, Attributable to PriceSmart |  | (121,216) | (110,059) | (103,951)
Balance |  | (110,059) | (103,951) | (101,512)
Balance |  | (121,216) | (110,059) | (103,951)
Foreign Currency Translation Adjustments [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss), Attributable to PriceSmart |  | (12,890) | (6,297) | (1,702)
Defined Benefit Pension Plans [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss), Attributable to PriceSmart | [1] | (87) | (166) | (182)
Derivative Instruments [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss), Attributable to PriceSmart | [2] | 1,779 | 316 | (535)
Reclassification From Accumulated Other Comprehensive Income (Loss) [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Amount reclassified from accumulated other comprehensive income (loss), Attributable to PriceSmart |  | 41 | 39 | (20)
AOCI Attributable to Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance |  |  |  |
Balance |  | (1) |  |
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss) |  | (1) |  |
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss) | [1] |  |  |
Accumulated Derivative Instruments Attributable to Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss) | [2] |  |  |
Reclassification From Other Comprehensive Income (Loss) Attributable To Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Amounts reclassified from accumulated other comprehensive income (loss) |  |  |  |
AOCI Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Balance |  | (110,059) | (103,951) | (101,512)
Balance |  | (121,217) | (110,059) | (103,951)
Accumulated Foreign Currency Adjustment Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss) |  | (12,891) | (6,297) | (1,702)
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss) | [1] | (87) | (166) | (182)
Accumulated Derivative Instruments Including Portion Attributable To Noncontrolling Interest [Member] |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Other comprehensive income (loss) | [2] | 1,779 | 316 | (535)
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) |  | $ 41 | $ 39 | $ (20)
[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] | See Note 12 - Derivative Instruments and Hedging Activities.

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