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Derivatives (Details) - Options - Cash flow hedges
BRL in Thousands, $ in Thousands
Jun. 30, 2015
USD ($)
Jun. 30, 2015
BRL
Jun. 30, 2014
USD ($)
Brazilian Real calls      
Derivative [Line Items]      
Notional amount | BRL   BRL 136,500  
Brazilian Real calls | Level 2      
Derivative [Line Items]      
Fair value $ 493   $ 432
Brazilian Real puts      
Derivative [Line Items]      
Notional amount | BRL   BRL (136,500)  
Brazilian Real puts | Level 2      
Derivative [Line Items]      
Fair value $ (2,035)   $ (46)