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Stock-Based Compensation - Performance Shares, RSUs, Restricted Stock and Share Unit Awards (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Apr. 30, 2016 | Jan. 31, 2016 | Oct. 31, 2015 | Apr. 30, 2016 | Apr. 30, 2015 | Jul. 31, 2015
Additional Disclosures |  |  |  |  |  |
Accrual of dividend equivalents, net of reversal |  |  |  | $ 97,000 | $ 169,000 |
Carrying value at period end | $ 523,530,000 |  |  | 523,530,000 |  | $ 72,468,000
Amount included in other liabilities | $ 4,776,000 |  |  | 4,776,000 |  | 3,633,000
Cash payments to remit employee's minimum statutory tax withholding requirements related to the net settlement of stock-based awards |  |  |  | $ 74,000 | 420,000 |
Performance Shares, RSUs, Restricted Stock and Share Units |  |  |  |  |  |
Awards (in Shares) |  |  |  |  |  |
Outstanding, Beginning Balance (in shares) | 224,405 | 234,463 | 224,165 | 224,165 |  |
Granted (in shares) | 9,000 |  | 62,440 |  |  |
Converted to common stock (in shares) |  | (4,725) | (6,988) |  |  |
Forfeited (in shares) | (1,438) | (5,333) | (45,154) |  |  |
Outstanding, Ending Balance (in shares) | 231,967 | 224,405 | 234,463 | 231,967 |  |
Vested, Ending Balance (in shares) | 31,181 |  |  | 31,181 |  |
Vested and Expected to Vest, Ending Balance (in shares) | 220,551 |  |  | 220,551 |  |
Weighted Average Grant Date Fair Value |  |  |  |  |  |
Outstanding, Beginning Balance (in dollars per share) | $ 28.41 | $ 28.39 | $ 28.26 | $ 28.26 |  |
Granted (in dollars per share) | 21.50 |  | 28.35 |  |  |
Converted to common stock (in dollars per share) |  | 26.77 | 25.28 |  |  |
Forfeited (in dollars per share) | 28.35 | 29.07 | 28.14 |  |  |
Outstanding, Ending Balance (in dollars per share) | 28.14 | $ 28.41 | $ 28.39 | 28.14 |  |
Vested, Ending Balance (in dollars per share) | 27.15 |  |  | 27.15 |  |
Vested and Expected to Vest, Ending Balance (in dollars per share) | $ 28.14 |  |  | $ 28.14 |  |
Aggregate Intrinsic Value |  |  |  |  |  |
Outstanding, Ending Balance | $ 5,614,000 |  |  | $ 5,614,000 |  |
Vested, Ending Balance |  |  |  | 755,000 |  |
Vested and Expected to Vest, Ending Balance | 5,337,000 |  |  | 5,337,000 |  |
Additional Disclosures |  |  |  |  |  |
Total intrinsic value of stock-based awards settled |  |  |  | $ 275,000 | $ 504,000 |
Performance Shares | Granted prior to fiscal 2014 |  |  |  |  |  |
Additional Disclosures |  |  |  |  |  |
Vesting period (in years) |  |  |  | 5 years 3 months 19 days |  |
Performance Shares | Granted since fiscal 2014 |  |  |  |  |  |
Additional Disclosures |  |  |  |  |  |
Vesting period (in years) |  |  |  |  | 3 years |
Performance period (in years) |  |  |  | 3 years |  |
RSUs and restricted stock | Non-Employee Director |  |  |  |  |  |
Additional Disclosures |  |  |  |  |  |
Vesting period (in years) |  |  |  | 3 years |  |
RSUs and restricted stock | Employees |  |  |  |  |  |
Additional Disclosures |  |  |  |  |  |
Vesting period (in years) |  |  |  | 5 years |  |
Dividend Equivalents |  |  |  |  |  |
Additional Disclosures |  |  |  |  |  |
Accrual of dividend equivalents, net of reversal |  |  |  | $ 97,000 |  |
Dividend equivalents paid |  |  |  | 8,000 |  |
Carrying value at period end | 414,000 |  |  | 414,000 |  | 325,000
Amount included in other liabilities | $ 247,000 |  |  | $ 247,000 |  | $ 306,000

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