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Short-Term Borrowings and Long-Term Debt Short-Term Borrowings and Long-Term Debt (Schedule of Debt) (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Jun. 30, 2017
Debt Instrument [Line Items]    
Current portion of long-term debt $ 104 $ 0
Revolving credit facility 355,503 91,871
Long-term debt 5,325 5,429
Total debt 360,932 97,300
Industrial Development Revenue Bond [Member]    
Debt Instrument [Line Items]    
Current portion of long-term debt 104 0
Long-term debt 5,325 5,429
Multi-Currency Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
Revolving credit facility $ 355,503 $ 91,871