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Restructuring (Details) (USD $)	12 Months Ended
Restructuring (Details) (USD $)	Jul. 31, 2012	Jul. 31, 2011
Restructuring Reserve [Roll Forward]
Expense	$ 2,200,000	$ 1,400,000
Severance
Restructuring Reserve [Roll Forward]
Balance at July 31, 2011	1,051,000
Expense	1,700,000	1,200,000
Payments	926,000
Balance at July 31, 2012	$ 1,800,000	$ 1,051,000

Amount charged against earnings in the period for incurred and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, excluding asset retirement obligations.

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- Definition

Amount of cash paid in the period to fully or partially settle a specified, previously accrued type of restructuring cost.

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