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Derivatives (Details) - Options - Cash flow hedges
BRL in Thousands, $ in Thousands
Sep. 30, 2015
USD ($)
Sep. 30, 2015
BRL
Jun. 30, 2015
USD ($)
Brazilian Real calls      
Derivative [Line Items]      
Notional amount   BRL 156,000  
Fair value | $ $ 564   $ 493
Brazilian Real puts      
Derivative [Line Items]      
Notional amount   BRL (156,000)  
Fair value | $ $ (7,009)   $ (2,035)