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Derivatives (Details)
R$ in Thousands, $ in Thousands
Jun. 30, 2018
USD ($)
Jun. 30, 2018
BRL (R$)
Jun. 30, 2017
USD ($)
Option | Cash flow hedges | Brazilian Real calls      
Derivative [Line Items]      
Notional amount | R$   R$ 65,000  
Option | Cash flow hedges | Brazilian Real calls | Other current assets      
Derivative [Line Items]      
Fair value $ 71   $ 2,686
Swap | Interest rate swap      
Derivative [Line Items]      
Notional amount 150,000    
Swap | Interest rate swap | Cash flow hedges | Other assets      
Derivative [Line Items]      
Fair value $ 5,078   $ 0