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Long-Term Debt Long-Term Foreign Seasonal Borrowings (Details)
$ in Thousands
Mar. 31, 2015
USD ($)
Debt Instrument [Line Items]  
Line of credit facility, amount outstanding $ 658,529
Long-Term Foreign Line of Credit [Member]  
Debt Instrument [Line Items]  
Line of credit facility, amount outstanding 30,000
Line of credit facility, current borrowing capacity $ 30,000