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Restructuring (Details 1) - Severance - USD ($)
$ in Thousands
12 Months Ended
Jul. 31, 2015
Jul. 31, 2014
Restructuring Reserve [Roll Forward]    
Beginning Balance $ 1,898 $ 2,224
Expense 590 4,598
Payments (1,538) (4,924)
Ending Balance $ 950 $ 1,898