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Stock-Based Compensation (Tables) | 3 Months Ended
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Oct. 31, 2014
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Stock Option Assumptions | The weighted-average assumptions used in the Black-Scholes valuation model are reflected in the following table:
|  | Three months ended October 31,
Black-Scholes Option Valuation Assumptions |  | 2014 |  | 2013
Expected term (in years) |  | 6.05 |  |  | 5.92 |
Expected volatility |  | 30.27 | % |  | 37.41 | %
Expected dividend yield |  | 2.48 | % |  | 2.36 | %
Risk-free interest rate |  | 1.91 | % |  | 1.78 | %
Weighted-average market value of underlying stock at grant date |  | $ | 22.66 |  |  | $ | 31.07 |
Weighted-average exercise price |  | $ | 22.66 |  |  | $ | 31.07 |
Weighted-average fair value of options granted during the period |  | $ | 6.10 |  |  | $ | 9.18 |
Summary of Stock Option Activity under Company's Share-Based Compensation Plans | A summary of stock option activity under the Company’s share-based compensation plans for the three months ended October 31, 2014 is presented below:
Options |  | Shares |  | Weighted Average Exercise Price |  | Weighted Average Remaining Contractual Term |  | Aggregate Intrinsic Value
Outstanding at July 31, 2014 |  | 4,204,260 |  | $ | 30.82 |  |  |  |  |
New grants |  | 612,427 |  | 22.66 |  |  |  |  |
Exercised |  | (3,500) |  | 20.95 |  |  |  |  |
Forfeited or expired |  | (469,845) |  | 29.81 |  |  |  |  |
Outstanding at October 31, 2014 |  | 4,343,342 |  | $ | 29.79 |  |  | 5.4 |  | $ | 1,175,785 |
Exercisable at October 31, 2014 |  | 3,339,992 |  | $ | 30.94 |  |  | 4.2 |  | $ | 584,528 |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity [Table Text Block] | The following table summarizes the RSU and restricted share activity under the Company's share-based compensation plans for the three months ended October 31, 2014:
Service-Based RSUs and Restricted Shares |  | Shares |  | Weighted Average Grant Date Fair Value
Outstanding at July 31, 2014 |  | 104,857 |  |  | $ | 31.02 |
New grants |  | 224,398 |  |  | 23.45 |
Vested |  | (32,458 | ) |  | 30.86 |
Forfeited |  | (19,477 | ) |  | 31.28 |
Outstanding at October 31, 2014 |  | 277,320 |  |  | $ | 24.90 |
Performance-Based RSUs and Restricted Shares |  | Shares |  | Weighted Average Grant Date Fair Value
Outstanding at July 31, 2014 |  | 80,000 |  |  | $ | 32.50 |
New grants |  | — |  |  | — |
Vested |  | — |  |  | — |
Forfeited |  | (80,000 | ) |  | 32.50 |
Outstanding at October 31, 2014 |  | — |  |  | $ | — |

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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 significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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