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Note 6. Derivative Instruments - The Effect of Derivative Instruments on Other Comprehensive Income (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Derivative Instruments, Gain (Loss)    
Derivative Instruments, Pre-Tax Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion $ (1,597) $ (184)
Foreign Exchange Contract    
Derivative Instruments, Gain (Loss)    
Derivative Instruments, Pre-Tax Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion $ (1,597) $ (184)