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Derivatives (Details) - Options - Cash flow hedges
BRL in Thousands, $ in Thousands
Sep. 30, 2016
USD ($)
Sep. 30, 2016
BRL
Jun. 30, 2016
USD ($)
Brazilian Real calls      
Derivative [Line Items]      
Notional amount | BRL   BRL 97,500  
Fair value | $ $ 2,815   $ 3,027
Brazilian Real puts      
Derivative [Line Items]      
Notional amount | BRL   BRL 97,500  
Fair value | $ $ (126)   $ (372)