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Derivatives (Detail Textuals) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Mar. 31, 2017
Mar. 31, 2017
Jun. 30, 2016
Derivative [Line Items]      
Unrecognized losses on derivative instruments recorded in earnings within the next twelve months $ 1,082 $ 1,082  
Options | Cash flow hedges      
Derivative [Line Items]      
Other comprehensive income (loss), unrealized gains (losses) on derivatives $ 758 1,062  
Options | Cash flow hedges | Cost of goods sold      
Derivative [Line Items]      
Realized losses on hedging derivatives recognized in cost of goods sold   580 $ 1,528
Options | Cash flow hedges | Other comprehensive income (loss)      
Derivative [Line Items]      
Unrecognized gains (losses) on derivative instruments   $ 3,717