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Gain (Losses) on Derivative Financial Instruments (Details) - Designated as Hedging Instrument [Member] - USD ($)
$ in Thousands
6 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Cross currency swap    
Derivative Instruments, Gain (Loss)    
Derivative and non derivative instruments gain (loss) recognized in accumulated oher comprehensive income (loss) $ 5,019 $ 7,793
Foreign denominated debt    
Derivative Instruments, Gain (Loss)    
Derivative and non derivative instruments gain (loss) recognized in accumulated oher comprehensive income (loss) $ 4,261 $ 4,273