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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, 2017
Jun. 30, 2016
Debt Instrument [Line Items]    
Total principal payments, revolving credit facility $ 91,871 $ 71,427
Total principal payments, long-term debt 5,429 5,429
Industrial Development Revenue Bond [Member]    
Debt Instrument [Line Items]    
2018 0  
2019 312  
2020 319  
2021 325  
2022 332  
Thereafter 4,141  
Total principal payments, long-term debt 5,429 5,429
Multi-Currency Revolving Credit Facility [Member]    
Debt Instrument [Line Items]    
2018 0  
2019 0  
2020 0  
2021 0  
2022 91,871  
Thereafter 0  
Total principal payments, revolving credit facility $ 91,871 $ 71,427