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Note 6. Derivative Instruments - The Effect of Derivative Instruments on Consolidated Statements of Income (Details) - USD ($)
$ in Thousands
3 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Derivative Instruments, Gain (Loss)    
Total Derivative Pre-Tax Gain (Loss) Recognized in Income $ (828) $ (502)
Foreign Exchange Contract | Nonoperating Income (Expense)    
Derivative Instruments, Gain (Loss)    
Derivatives Not Designated as Hedging Instruments, Pre-Tax Gain (Loss) Recognized in Income (818) (223)
Cash Flow Hedging | Foreign Exchange Contract | Cost of Sales    
Derivative Instruments, Gain (Loss)    
Derivatives, Pre-Tax Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion $ (10) $ (279)