Summarized Financial Information of Net Revenue From External Customers by Group of Services (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Jul. 31, 2014	Apr. 30, 2014	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2013	Oct. 31, 2012	Jul. 31, 2014	Jul. 31, 2013	Jul. 31, 2012
Revenue from External Customer [Line Items]
Net revenue	$ 164,700	$ 173,274	$ 194,011	$ 191,415	$ 181,001	$ 173,016	$ 203,436	$ 197,051	$ 723,400	$ 754,504	$ 713,947
Supply Chain Services
Revenue from External Customer [Line Items]
Net revenue									635,503	676,709	646,564
After Market Services
Revenue from External Customer [Line Items]
Net revenue									49,665	41,966	33,575
e-Business Services
Revenue from External Customer [Line Items]
Net revenue									$ 38,232	$ 35,829	$ 33,808