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Long-Term Debt (Details) (USD $)
Jun. 30, 2014
Jun. 30, 2013
Debt Instrument [Line Items]    
Additional Seasonal Borrowing Capacity $ 40,000,000  
Long-term debt [Abstract]    
Total debt 430,971,000 300,426,000
Receivables Securitization Facility [Member]
   
Long-term debt [Abstract]    
Receivables Securitization Facility 160,000,000 0
Unsecured Syndicated Senior Credit Facility[Member]
   
Long-term debt [Abstract]    
Revolving Credit Facility $ 270,971,000 $ 300,426,000