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Derivatives (Detail Textuals) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2018
Jul. 31, 2017
Jun. 30, 2017
Interest rate swap      
Derivative [Line Items]      
Derivative, notional amount $ 150,000 $ 150,000  
Percentage of interest rate   1.8325%  
Cash flow hedges | Other current assets      
Derivative [Line Items]      
Fair values of total foreign currency derivatives outstanding $ 71    
Maximum maturity period of foreign currency derivatives 1 year    
Cash flow hedges | Cost of goods sold      
Derivative [Line Items]      
Realized gains related to matured contracts recorded as a component of inventory $ 1,084   $ 966
Realized gain (losses) on derivative instruments $ 3,136