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Stockholder's Investments (Tables) | 12 Months Ended
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Jul. 31, 2015
Equity [Abstract] |
Schedule of Capital Stock | Information as to the Company’s capital stock at July 31, 2015 and 2014 is as follows:
|  | July 31, 2015 |  | July 31, 2014
|  | Shares Authorized |  | Shares Issued |  | (thousands) Amount |  | Shares Authorized |  | Shares Issued |  | (thousands) Amount
Preferred Stock, $.01 par value |  | 5,000,000 |  |  |  |  |  |  | 5,000,000 |  |  |  |  |
Cumulative Preferred Stock: 6% Cumulative |  | 5,000 |  |  |  |  |  |  | 5,000 |  |  |  |  |
1972 Series |  | 10,000 |  |  |  |  |  |  | 10,000 |  |  |  |  |
1979 Series |  | 30,000 |  |  |  |  |  |  | 30,000 |  |  |  |  |
Common Stock, $.01 par value: Class A Nonvoting |  | 100,000,000 |  |  | 51,261,487 |  |  | $ | 513 |  |  | 100,000,000 |  |  | 51,261,487 |  |  | $ | 513 |
Class B Voting |  | 10,000,000 |  |  | 3,538,628 |  |  | 35 |  |  | 10,000,000 |  |  | 3,538,628 |  |  | 35 |
|  |  |  |  |  | $ | 548 |  |  |  |  |  |  | $ | 548 |
Schedule of Other Activity in Stockholders' Investment | The following is a summary of other activity in stockholders’ investment for the fiscal years ended July 31, 2015, 2014, and 2013:
|  | Unearned Restricted Stock |  | Deferred Compensation |  | Shares Held in Rabbi Trust, at cost |  | Total
Balances at July 31, 2012 |  | $ | (3,763 | ) |  | $ | 11,610 |  |  | $ | (11,151 | ) |  | $ | (3,304 | )
Shares at July 31, 2012 |  |  |  | 517,105 |  |  | 517,105 |  |  |
Sale of shares at cost |  | — |  |  | (1,461 | ) |  | 1,419 |  |  | (42 | )
Purchase of shares at cost |  | — |  |  | 891 |  |  | (891 | ) |  | — |
Forfeitures of restricted stock |  | 838 |  |  | — |  |  | — |  |  | 838 |
Amortization of restricted stock |  | 1,788 |  |  | — |  |  | — |  |  | 1,788 |
Balances at July 31, 2013 |  | (1,137 | ) |  | 11,040 |  |  | (10,623 | ) |  | (720 | )
Shares at July 31, 2013 |  |  |  | $ | 469,797 |  |  | $ | 469,797 |  |  |
Sale of shares at cost |  | $ | — |  |  | (1,637 | ) |  | 1,496 |  |  | $ | (141 | )
Purchase of shares at cost |  | — |  |  | 821 |  |  | (821 | ) |  | — |
Effect of plan amendment |  | — |  |  | (2,435 | ) |  | — |  |  | (2,435 | )
Amortization of restricted stock |  | 1,137 |  |  | — |  |  | — |  |  | 1,137 |
Balances at July 31, 2014 |  | $ | — |  |  | $ | 7,789 |  |  | $ | (9,948 | ) |  | $ | (2,159 | )
Shares at July 31, 2014 |  |  |  | 338,711 |  |  | 423,415 |  |  |
Sale of shares at cost |  | — |  |  | (2,325 | ) |  | 2,235 |  |  | (90 | )
Purchase of shares at cost |  | — |  |  | 220 |  |  | (1,035 | ) |  | (815 | )
Balances at July 31, 2015 |  | $ | — |  |  | $ | 5,684 |  |  | $ | (8,748 | ) |  | $ | (3,064 | )
Shares at July 31, 2015 |  |  |  | 252,261 |  |  | 362,025 |  |  |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions |
Black-Scholes Option Valuation Assumptions |  | 2015 |  | 2014 |  | 2013
Expected term (in years) |  | 6.05 |  |  | 5.97 |  |  | 5.93 |
Expected volatility |  | 34.01 | % |  | 37.32 | % |  | 38.67 | %
Expected dividend yield |  | 2.48 | % |  | 2.35 | % |  | 2.21 | %
Risk-free interest rate |  | 1.90 | % |  | 1.80 | % |  | 0.91 | %
Weighted-average market value of underlying stock at grant date |  | $ | 22.76 |  |  | $ | 30.98 |  |  | $ | 30.58 |
Weighted-average exercise price |  | $ | 22.76 |  |  | $ | 30.98 |  |  | $ | 30.58 |
Weighted-average fair value of options granted during the period |  | $ | 6.12 |  |  | $ | 9.17 |  |  | $ | 9.05 |
Summary of Stock Option Activity under Company's Share-Based Compensation Plans | for the fiscal year ended July 31, 2015:
|  | Option Price |  | Options Outstanding |  | Weighted Average Exercise Price
Balance as of July 31, 2014 |  | $ | 17.23 |  | — | $40.37 |  | 4,204,260 |  |  | $ | 30.82 |
Options granted |  | 22.66 |  | — | 27.28 |  | 628,340 |  |  | 22.76 |
Options exercised |  | 17.23 |  | — | 27.00 |  | (68,533 | ) |  | 23.73 |
Options cancelled |  | 22.63 |  | — | 40.37 |  | (1,263,116 | ) |  | 30.48 |
Balance as of July 31, 2015 |  | $ | 20.95 |  | — | $38.31 |  | 3,500,951 |  |  | $ | 29.64 |
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range | The following table summarizes information about stock options outstanding at July 31, 2015:
|  | Options Outstanding |  | Options Outstanding and Exercisable
Range of Exercise Prices |  | Number of Shares Outstanding at July 31, 2015 |  | Weighted Average Remaining Contractual Life (in years) |  | Weighted Average Exercise Price |  | Shares Exercisable at July 31, 2015 |  | Weighted Average Remaining Contractual Life (in years) |  | Weighted Average Exercise Price
$20.95 - $26.99 |  | 711,527 |  |  | 7.7 |  | $ | 22.27 |  |  | 180,667 |  |  | 3.4 |  | $ | 20.95 |
$27.00 - $32.99 |  | 1,976,924 |  |  | 5.8 |  | 29.12 |  |  | 1,667,452 |  |  | 5.5 |  | 28.86 |
$33.00 - $38.31 |  | 812,500 |  |  | 2.0 |  | 37.34 |  |  | 794,836 |  |  | 1.8 |  | 37.39 |
Total |  | 3,500,951 |  |  | 5.3 |  | 29.64 |  |  | 2,642,955 |  |  | 4.3 |  | $ | 30.88 |
Schedule of Share-based Compensation, Restricted Stock and Restricted Stock Units Activity | The following tables summarize the RSU and restricted share activity for the fiscal year ended July 31, 2015:
Service-Based Restricted Shares and RSUs |  | Shares |  | Weighted Average Grant Date Fair Value
Balance as of July 31, 2014 |  | 104,857 |  |  | $ | 31.02 |
New grants |  | 661,412 |  |  | 24.28 |
Vested |  | (34,247 | ) |  | 30.79 |
Forfeited |  | (54,568 | ) |  | 27.64 |
Balance as of July 31, 2015 |  | 677,454 |  |  | $ | 24.72 |
The service-based restricted shares and RSUs awarded during the fiscal years ended July 31, 2014 and 2013 had a weighted-average grant-date fair value of $30.93 and $32.99, respectively.
Performance-Based Restricted Shares and RSUs |  | Shares |  | Weighted Average Grant Date Fair Value
Balance as of July 31, 2014 |  | 80,000 |  |  | $ | 32.50 |
New grants |  | — |  |  | — |
Vested |  | — |  |  | — |
Forfeited |  | (80,000 | ) |  | 32.50 |
Balance as of July 31, 2015 |  | — |  |  | $ | — |
The performance-based restricted shares and RSUs awarded during the fiscal year ended July 31, 2013 had a weighted-average grant-date fair value of $30.21. No performance-based restricted shares were granted during the fiscal year ended July 31, 2014.

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