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Short-Term Borrowings and Long-Term Debt (Maturities of Revolving Credit Facility and Long-term Debt) (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Jun. 30, 2017
Debt Instrument [Line Items]    
Total principal payments, revolving credit facility $ 244,000 $ 91,871
Industrial Development Revenue Bond [Member]    
Debt Instrument [Line Items]    
2019 551  
2020 338  
2021 342  
2022 347  
2023 351  
Thereafter 3,500  
Total principal payments, long-term debt 5,429  
Multi-Currency Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
2019 0  
2020 0  
2021 0  
2022 244,000  
2023 0  
Thereafter 0  
Total principal payments, revolving credit facility $ 244,000 $ 91,871