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Derivatives (Details) - Cash flow hedges
R$ in Thousands, $ in Thousands
Mar. 31, 2018
USD ($)
Mar. 31, 2018
BRL (R$)
Jun. 30, 2017
USD ($)
Options | Brazilian Real calls      
Derivative [Line Items]      
Notional amount | R$   R$ 0  
Options | Brazilian Real calls | Other current assets      
Derivative [Line Items]      
Fair value $ 0   $ 2,686
Swap | Interest rate swap      
Derivative [Line Items]      
Notional amount 150,000    
Swap | Interest rate swap | Other assets      
Derivative [Line Items]      
Fair value $ 4,118   $ 0