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Short-Term Borrowings and Long-Term Debt (Maturities of Revolving Credit Facility and Long-term Debt) (Details)
$ in Thousands
Jun. 30, 2020
USD ($)
Mississippi Revenue Bond [Member]  
Debt Instrument [Line Items]  
2021 $ 339
2022 343
2023 348
2024 352
2025 357
Thereafter 3,025
Total principal payments, long-term debt 4,764
Multi-Currency Revolving Credit Facility [Member]  
Debt Instrument [Line Items]  
2021 0
2022 0
2023 0
2024 67,714
2025 0
Thereafter 0
Total principal payments, long-term debt 67,714
Term Loan Facility [Member]  
Debt Instrument [Line Items]  
2021 7,500
2022 7,500
2023 11,250
2024 120,000
2025 0
Thereafter 0
Total principal payments, long-term debt $ 146,250