Note 15 - Related Party Transactions (Tables)
3 Months Ended
Nov. 30, 2012
Schedule of Related Party Transactions [Table Text Block]
   
Three Months Ended
 
   
2012
   
2011
 
Westinghouse related
  $ 9,761     $ 1,731  
Other
    4,961       3,856  
Total revenue from unconsolidated entities
  $ 14,722     $ 5,587  
Schedule of Balances From Unconsolidated Entities [Table Text Block]
       
   
November 30,
2012
   
August 31,
2012
 
Westinghouse related
  $ 169     $ 266  
Other
    2,961       3,994  
Total accounts and other receivables from unconsolidated entities
  $ 3,130     $ 4,260  
   
November 30,
 2012
   
August 31,
2012
 
Westinghouse related
  $ 66,051     $ 57,982  
Other
    1,739       1,322  
Total costs and estimated earnings in excess of billings on uncompleted contracts from unconsolidated entities
  $ 67,790     $ 59,304  
   
November 30,
2012
   
August 31,
2012
 
Westinghouse related
  $     $ 19  
Other
           
Total advances to unconsolidated entities
  $     $ 19