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Commitments and Contingencies (Tables)
9 Months Ended
May 31, 2014
Unrecorded Unconditional Purchase Obligation [Line Items]  
Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block]
Minimum future payments required under long-term unconditional purchase obligations as of May 31, 2014 are as follows:

 
Payments Due by Period
 
Total
 
Less than
1 Year
 
1 - 3
Years
 
3 - 5
Years
 
More than
5 Years
 
(Dollars in thousands)
Long-term unconditional purchase obligations
$
503,960

 
$
62,769

 
$
130,048

 
$
91,324

 
$
219,819