Unrecognized Tax Benefit (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2013	Jul. 31, 2012
Schedule of Unrecognized Tax Benefits [Line Items]
Gross Amount Of Unrecognized Tax Benefits Excluding Interest And Penalties Pertaining To Uncertain Tax Positions	$ 7,229	$ 6,756

Gross Amount Of Unrecognized Tax Benefits Excluding Interest And Penalties Pertaining To Uncertain Tax Positions

No definition available.

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Period Type:	instant