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Derivatives (Details) - Cash flow hedges
R$ in Thousands, $ in Thousands
Sep. 30, 2018
USD ($)
Sep. 30, 2018
BRL (R$)
Jun. 30, 2018
USD ($)
Options | Brazilian Real calls      
Derivative [Line Items]      
Notional amount | R$   R$ 94,500  
Options | Brazilian Real calls | Other current assets      
Derivative [Line Items]      
Fair value [1] $ 496   $ 71
Options | Brazilian Real puts      
Derivative [Line Items]      
Notional amount | R$   R$ 94,500  
Options | Brazilian Real puts | Other current assets      
Derivative [Line Items]      
Fair value [1] (556)   0
Swap | Interest rate swap      
Derivative [Line Items]      
Notional amount 150,000    
Swap | Interest rate swap | Other assets      
Derivative [Line Items]      
Fair value $ 5,728   $ 5,078
[1] We record the net fair values of our outstanding foreign currency option contracts within the respective balance sheet line item based on the net financial position and maturity date of the individual contracts as of the balance sheet date. As of September 30, 2018, the net fair value of $60 was included in accrued expenses and other current liabilities. As of June 30, 2018, the net fair value of $71 was included in other current assets.