Stock Option Plan and Employee Stock Purchase Plan (Tables)

3 Months Ended

Oct. 31, 2011

Stock Option Plan and Employee Stock Purchase Plan [Abstract]

	Number of Shares Underlying Stock-Based Awards	Weighted Average Exercise Price	Weighted Average Remaining Contractual Term (Years)	Aggregate Intrinsic Value
Outstanding at July 31, 2011	3,580,168	$ 31.86
Granted	52,000	27.16
Expired/canceled	(241,043)	36.64
Exercised	(99,260)	22.57
Outstanding at October 31, 2011	3,291,865	$ 31.71	4.47	$ 15,062,000
Exercisable at October 31, 2011	1,914,915	$ 34.15	2.13	$ 8,475,000
Vested and expected to vest at October 31, 2011	3,232,765	$ 31.77	4.39	$ 14,784,000

- Definition

Tabular disclosure of components of a stock option or other award plan under which equity-based compensation is awarded to employees, typically comprised of the amount of unearned compensation (deferred compensation cost), compensation expense, and changes in the quantity and fair value of the shares (or other type of equity) granted, exercised, forfeited, and issued and outstanding pertaining to that plan. Disclosure may also include nature and general terms of such arrangements that existed during the period and potential effects of those arrangements on shareholders, effect of compensation cost arising from equity-based payment arrangements on the income statement, method of estimating the fair value of the goods or services received, or the fair value of the equity instruments granted, during the period, cash flow effects resulting from equity-based payment arrangements and, for registrants that accelerate vesting of out of the money share options, reasons for the decision to accelerate.

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