Stock-Based Compensation (Details) (Stock Options, USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended	12 Months Ended
Oct. 31, 2013	Jul. 31, 2013
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Options Outstanding, Number (shares)	48	60
Options, Outstanding, Weighted Average Exercise Price	$ 15.27	$ 14.25
Options, Outstanding, Weighted Average Remaining Contractual Term (years)	2 years 6 months 19 days	2 years 3 months 19 days
Options, Outstanding, Aggregate Intrinsic Value	$ 966	$ 1,059
Exercised, Number (shares)	(4)
Exercised, Weighted Average Exercise Price	$ 12.00
Exercised, Aggregate Intrinsic Value	90
Forfeitures, Number (shares)	(8)
Forfeitures, Weighted Average Exercise Price	$ 9.43
Options Exercisable, Number (shares)	48
Exercisable, Weighted Average Exercise Price	$ 15.27
Exercisable, Weighted Average Remaining Contractual Term (years)	2 years 6 months 19 days
Exercisable, Aggregate Intrinsic Value	$ 966

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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- Definition

The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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-Publisher FASB

-Name Accounting Standards Codification

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-Section 50

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Number of options outstanding, including both vested and non-vested options.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Number of share options (or share units) exercised during the current period.

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