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Short Term Borrowings and Long Term Debt (Long-term Debt) (Details) - USD ($)
Jun. 30, 2022
Jun. 30, 2021
Apr. 30, 2019
Debt Instrument [Line Items]      
Current portion of long-term debt $ 11,598,000 $ 7,843,000  
Long-term debt, excluding current maturities 123,733,000 135,331,000  
Borrowings under revolving credit facility 135,839,000 0  
Total debt 271,170,000 143,174,000  
Senior secured term loan facility, net of current portion      
Debt Instrument [Line Items]      
Long-term debt, excluding current maturities 120,000,000 131,250,000 $ 150,000,000
Multi-Currency Revolving Credit Facility      
Debt Instrument [Line Items]      
Borrowings under revolving credit facility 135,839,000 0  
Mississippi revenue bond, net of current portion      
Debt Instrument [Line Items]      
Long-term debt, excluding current maturities $ 3,733,000 $ 4,081,000