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Inventories
12 Months Ended
Jun. 30, 2012
Inventories [Abstract]  
Inventories
(4)
Inventories

Inventories comprise the following at June 30:

   
2012
  
2011
 
Finished goods
 $41,550   29,570 
Work in process
  403   2,078 
Raw materials
  62,957   67,213 
Parts and supplies
  14,531   10,431 
Total
 $119,441   109,292 

At June 30, 2012, $112,418 in inventory is valued using the first-in, first-out method and $7,023 using the average cost method. At June 30, 2011, $102,478 in inventory is valued using the first-in, first-out method and $6,814 using the average cost method.