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Restructuring
12 Months Ended
Jul. 31, 2012
Restructuring and Related Activities [Abstract]  
Restructuring
(19)
  Restructuring
 
The Company relocated its corporate headquarters to Dallas, Texas in 2012. The Company recognized $2.2 million and $1.4 million for the year ended July 31, 2012 and 2011, respectively, in general and administrative expense. The Company also recognized restructuring-related costs of $1.1 million in impairment of long-lived assets and $0.8 million in yard operations expense for the year ended July 31, 2012. Restructuring-related costs for the year ended July 31, 2012 are $1.7 million for severance and $2.4 million for the costs of relocating employees to Texas. Restructuring-related costs for the year ended July 31, 2011 are $1.2 million for severance and $0.2 million for the costs of relocating employees to Texas.

 
     Balance at
July 31, 2011
(in 000’s)
   Expense
(in 000’s)
   Payments
(in 000’s)
   Balance at
July 31, 2012
(in 000’s)
Severance
              $ 1,051             1,675             926           $ 1,800