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Stockholders' Equity (Tables) | 12 Months Ended
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Jul. 31, 2013
Schedule of Stock Option Activity | A summary of option activity under the 1999 Plan, the 2010 Equity and Incentive Plan and the 2006 Equity Incentive Plan is as follows:
|  | 2013 |  |  | 2012 |  |  | 2011 |
|  | Shares |  |  | Weighted- Average Exercise Price |  |  | Shares |  |  | Weighted- Average Exercise Price |  |  | Shares |  |  | Weighted- Average Exercise Price |
Outstanding at beginning of year |  |  | 732,725 |  |  | $ | 28.89 |  |  |  | 1,433,225 |  |  | $ | 30.90 |  |  |  | 1,381,725 |  |  | $ | 30.20 |
Exercised |  |  | (498,412) |  |  |  | 28.62 |  |  |  | (80,500) |  |  |  | 17.74 |  |  |  | (78,500) |  |  |  | 13.33 |
Forfeited |  |  | (120,000) |  |  |  | 27.84 |  |  |  | (600,000) |  |  |  | 35.18 |  |  |  | – |  |  |  | – |
Expired |  |  | (8,000) |  |  |  | 26.91 |  |  |  | (20,000) |  |  |  | 29.25 |  |  |  | – |  |  |  | – |
Granted |  |  | – |  |  |  | – |  |  |  | – |  |  |  | – |  |  |  | 130,000 |  |  |  | 27.72 |
Outstanding at end of year |  |  | 106,313 |  |  | $ | 31.48 |  |  |  | 732,725 |  |  | $ | 28.89 |  |  |  | 1,433,225 |  |  | $ | 30.90 |
Vested and expected to vest at end of year |  |  | 106,313 |  |  | $ | 31.48 |  |  |  | 712,725 |  |  | $ | 28.82 |  |  |  | 833,225 |  |  | $ | 27.82 |
Exercisable at end of year |  |  | 106,313 |  |  | $ | 31.48 |  |  |  | 566,059 |  |  | $ | 29.24 |  |  |  | 609,891 |  |  | $ | 27.84 |
Schedule of Aggregate Intrinsic Value of Options | The aggregate intrinsic value of options outstanding and exercisable as of July 31, 2013, 2012 and 2011 is as follows:
|  | 2013 |  |  | 2012 |  |  | 2011 |
Aggregate intrinsic value of options outstanding and expected to vest |  | $ | 2,399 |  |  | $ | 966 |  |  | $ | 647 |
Aggregate intrinsic value of options exercisable |  | $ | 2,399 |  |  | $ | 738 |  |  | $ | 647 |
Schedule of Assumptions Used in Determining Fair Value of Options | The assumptions used in determining the fair value of the options granted during fiscal 2011 are as follows:
Grant Date |  | July 19, 2011 |  |  | March 14, 2011 |
Expected volatility |  |  | 46% |  |  |  | 46% |
Expected life of grant |  |  | 6 years |  |  |  | 6 years |
Risk-free interest rate |  |  | 1.8% |  |  |  | 2.3% |
Expected dividend rate |  |  | 1.8% |  |  |  | 1.2% |
Restricted Stock Awards |
Summary of Stock Award Activity | There was no restricted stock activity under the 2010 Equity and Incentive Plan in fiscal 2011, and a summary of restricted stock award activity under this Plan for fiscal 2013 and fiscal 2012 is as follows:
|  | 2013 |  |  | 2012 |
|  | Shares |  |  | Weighted- Average Grant Date Fair Value |  |  | Shares |  |  | Weighted- Average Grant Date Fair Value |
Nonvested, beginning of year |  |  | 10,041 |  |  | $ | 29.46 |  |  |  | – |  |  | $ | – |
Granted |  |  | 9,498 |  |  |  | 32.36 |  |  |  | 10,041 |  |  |  | 29.46 |
Vested |  |  | (2,009) |  |  |  | 29.46 |  |  |  | – |  |  |  | – |
Forfeited |  |  | – |  |  |  | – |  |  |  | – |  |  |  | – |
Nonvested, end of year |  |  | 17,530 |  |  | $ | 31.03 |  |  |  | 10,041 |  |  | $ | 29.46 |
Restricted Stock Units (RSUs) |
Summary of Stock Award Activity | A summary of restricted stock unit activity during fiscal 2013 is included below:
|  | Restricted Stock Units |  |  | Weighted- Average Grant Date Fair Value |
Nonvested, beginning of year |  |  | – |  |  | $ | – |
Granted |  |  | 143,069 |  |  |  | 38.01 |
Vested |  |  | – |  |  |  | – |
Forfeited |  |  | (3,794) |  |  |  | 36.32 |
Nonvested, end of year |  |  | 139,275 |  |  | $ | 38.06 |

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- Definition Tabular disclosure of the total intrinsic value of options exercised (or share units converted), share-based liabilities paid, and the total fair value of shares vested during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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- Definition Tabular disclosure of the number and weighted-average exercise prices (or conversion ratios) for share options (or share units) that were outstanding at the beginning and end of the year, vested and expected to vest, exercisable or convertible at the end of the year, and the number of share options or share units that were granted, exercised or converted, forfeited, and expired during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the weighted-average grant-date fair value of equity options or other equity instruments granted during the year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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