XML 35 R52.htm IDEA: XBRL DOCUMENT v2.4.0.8
Inventories - Additional Information (Detail) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2014
Jul. 31, 2013
Inventory [Line Items]    
Inventory $ 244,342 $ 179,338
Subsidiaries valued inventory in first-in, first-out method 36,096 15,335
Inventory obsolescence reserve $ 2,057 $ 2,393