Stock-Based Compensation - Performance Shares, RSUs, Restricted Stock and Share Unit Awards (Details)
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3 Months Ended |
9 Months Ended |
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Apr. 30, 2017
USD ($)
$ / shares
shares
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Apr. 30, 2017
USD ($)
$ / shares
shares
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Jan. 31, 2017
$ / shares
shares
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Oct. 31, 2016
$ / shares
shares
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Apr. 30, 2016
USD ($)
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Apr. 30, 2017
USD ($)
$ / shares
shares
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Apr. 30, 2016
USD ($)
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Jul. 31, 2016
USD ($)
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| Additional Disclosures |
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| Accrual of dividend equivalents, net of reversal | $ |
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$ 228,000
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$ 97,000
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| Carrying value at period end | $ |
$ 394,103,000
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$ 394,103,000
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394,103,000
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$ 450,795,000
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| Cash payments to remit employee's minimum statutory tax withholding requirements related to the net settlement of stock-based awards | $ |
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$ 244,000
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74,000
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| Performance Shares, RSUs, Restricted Stock and Share Units |
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| Awards (in Shares) |
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| Outstanding, Beginning Balance (in shares) |
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567,976
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592,036
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217,213
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217,213
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| Granted (in shares) |
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5,836
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2,632
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418,684
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| Converted to common stock (in shares) |
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(19,866)
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(38,706)
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| Forfeited (in shares) |
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(9,848)
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(6,826)
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(5,155)
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| Outstanding, Ending Balance (in shares) |
563,964
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563,964
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567,976
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592,036
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563,964
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| Vested, Ending Balance (in shares) |
35,400
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35,400
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35,400
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| Vested and Expected to Vest, Ending Balance (in shares) |
540,161
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540,161
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540,161
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| Weighted Average Grant Date Fair Value |
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| Outstanding, Beginning Balance (in dollars per share) | $ / shares |
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$ 17.34
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$ 17.80
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$ 28.32
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$ 28.32
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| Granted (in dollars per share) | $ / shares |
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11.04
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11.40
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13.10
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| Converted to common stock (in dollars per share) | $ / shares |
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29.41
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14.75
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| Forfeited (in dollars per share) | $ / shares |
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13.64
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19.65
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25.10
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| Outstanding, Ending Balance (in dollars per share) | $ / shares |
$ 17.34
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17.34
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$ 17.34
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$ 17.80
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17.34
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| Vested, Ending Balance (in dollars per share) | $ / shares |
26.94
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26.94
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26.94
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| Vested and Expected to Vest, Ending Balance (in dollars per share) | $ / shares |
$ 17.34
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$ 17.34
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$ 17.34
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| Aggregate Intrinsic Value |
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| Outstanding, Ending Balance | $ |
$ 7,901,000
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$ 7,901,000
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$ 7,901,000
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| Vested, Ending Balance | $ |
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496,000
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| Vested and Expected to Vest, Ending Balance | $ |
$ 7,568,000
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7,568,000
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7,568,000
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| Additional Disclosures |
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| Total intrinsic value of stock-based awards settled | $ |
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$ 0
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$ 0
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$ 633,000
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$ 275,000
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| Performance Shares |
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| Additional Disclosures |
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| RSUs and restricted stock into common stock, conversion ratio |
1
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1
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1
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| Performance Shares | Granted prior to fiscal 2014 |
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| Additional Disclosures |
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| Vesting period (in years) |
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5 years 3 months 19 days
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| Performance Shares | Granted since fiscal 2014 |
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| Additional Disclosures |
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| Performance period (in years) |
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3 years
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3 years
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| RSUs and restricted stock | Non-Employee Director |
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| Additional Disclosures |
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| Vesting period (in years) |
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3 years
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| RSUs and restricted stock into common stock, conversion ratio |
1
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1
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1
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| RSUs and restricted stock | Employees |
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| Additional Disclosures |
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| Vesting period (in years) |
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5 years
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| RSUs and restricted stock into common stock, conversion ratio |
1
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1
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1
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| Share units |
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| Additional Disclosures |
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| RSUs and restricted stock into common stock, conversion ratio |
1
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1
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1
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| Share-Based Compensation Arrangement By Share-Based Payment Award, Equity Instruments Other Than Options, Granted Units Converted Into Common Stock |
744
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| Dividend Equivalents |
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| Additional Disclosures |
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| Accrual of dividend equivalents, net of reversal | $ |
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$ 228,000
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| Dividend equivalents paid | $ |
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|
164,000
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| Carrying value at period end | $ |
$ 521,000
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$ 521,000
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$ 521,000
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$ 457,000
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| 2000 Stock Incentive Plan | Performance Shares |
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| Awards (in Shares) |
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| Outstanding, Ending Balance (in shares) |
252,089
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252,089
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252,089
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| 2000 Stock Incentive Plan | RSUs and restricted stock |
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| Awards (in Shares) |
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| Outstanding, Ending Balance (in shares) |
304,116
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304,116
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304,116
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| 2000 Stock Incentive Plan | Share units |
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| Awards (in Shares) |
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| Outstanding, Ending Balance (in shares) |
7,759
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7,759
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7,759
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