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Stock-Based Compensation (Performance Shares, RSUs, Restricted Stock and Share Unit Awards) (Details) |  |  |  | 3 Months Ended | 6 Months Ended |  |  |  |
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Aug. 01, 2022 | Jul. 31, 2022 | Jul. 31, 2017 | Jan. 31, 2025 USD ($) $ / shares shares | Oct. 31, 2024 $ / shares shares | Jan. 31, 2024 USD ($) | Jan. 31, 2025 USD ($) $ / shares shares | Jan. 31, 2024 USD ($) | Jan. 10, 2025 USD ($) | Jul. 31, 2024 USD ($) | Jul. 31, 2023 | Jul. 30, 2017
Additional Disclosures |  |  |  |  |  |  |  |  |  |  |  |
Estimated forfeitures related to unvested stock-based awards |  |  |  | $ 548,000 |  |  | $ 548,000 |  |  |  |  |
Forfeitures related to total unrecognized stock based compensation authorization pending |  |  |  |  |  |  |  |  | $ 2,000,000 |  |  |
Dividend Equivalents [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Reversal of dividend equivalents |  |  |  | 5,000 |  | $ 13,000 | 32,000 | $ 36,000 |  |  |  |
Carrying value at period end |  |  |  | $ 519,536,000 |  |  | $ 519,536,000 |  |  | $ 426,105,000 |  |
Performance shares, RSUs, Restricted stock and share units |  |  |  |  |  |  |  |  |  |  |  |
Awards (In Shares) |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, Beginning Balance (in shares) | shares |  |  |  | 2,621,963 | 1,800,288 |  | 1,800,288 |  |  |  |  |
Granted (in shares) | shares |  |  |  | 489,191 | 1,154,859 |  |  |  |  |  |  |
Settled (in shares) | shares |  |  |  | (578,751) | (204,292) |  |  |  |  |  |  |
Canceled/Forfeited (in shares) | shares |  |  |  | (643,012) | (128,892) |  |  |  |  |  |  |
Outstanding, Ending Balance (in shares) | shares |  |  |  | 1,889,391 | 2,621,963 |  | 1,889,391 |  |  |  |  |
Vested, Ending Balance (in shares) | shares |  |  |  | 125,904 |  |  | 125,904 |  |  |  |  |
Vested and Expected to Vest, Ending Balance (in shares) | shares |  |  |  | 1,811,411 |  |  | 1,811,411 |  |  |  |  |
Weighted Average Grant Date Fair Value |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, Beginning Balance (in dollars per share) | $ / shares |  |  |  | $ 8.11 | $ 10.61 |  | $ 10.61 |  |  |  |  |
Granted (in dollars per share) | $ / shares |  |  |  | 3.63 | 5.04 |  |  |  |  |  |  |
Settled (in dollars per share) | $ / shares |  |  |  | 9.41 | 11.26 |  |  |  |  |  |  |
Canceled/Forfeited (in dollars per share) | $ / shares |  |  |  | 5.48 | 10.61 |  |  |  |  |  |  |
Outstanding, Ending Balance (in dollars per share) | $ / shares |  |  |  | 6.61 | $ 8.11 |  | 6.61 |  |  |  |  |
Vested, Ending Balance (in dollars per share) | $ / shares |  |  |  | 13.09 |  |  | 13.09 |  |  |  |  |
Vested and Expected to Vest, Ending Balance (in dollars per share) | $ / shares |  |  |  | $ 6.60 |  |  | $ 6.60 |  |  |  |  |
Aggregate Intrinsic Value |  |  |  |  |  |  |  |  |  |  |  |
Outstanding, Ending Balance |  |  |  | $ 3,779,000 |  |  | $ 3,779,000 |  |  |  |  |
Vested, Ending Balance |  |  |  |  |  |  | 252,000 |  |  |  |  |
Vested and Expected to Vest, Ending Balance |  |  |  | 3,623,000 |  |  | 3,623,000 |  |  |  |  |
Additional Disclosures |  |  |  |  |  |  |  |  |  |  |  |
Total intrinsic value relating to fully vested stock-based awards converted during the period |  |  |  | 1,632,000 |  | 4,789,000 | $ 2,268,000 | 7,445,000 |  |  |  |
Performance shares | Employees | Granted since fiscal 2014 |  |  |  |  |  |  |  |  |  |  |  |
Additional Disclosures |  |  |  |  |  |  |  |  |  |  |  |
Performance period (in years) |  |  |  |  |  |  | 3 years |  |  |  |  |
RSUs and restricted stock | Employees |  |  |  |  |  |  |  |  |  |  |  |
Additional Disclosures |  |  |  |  |  |  |  |  |  |  |  |
Vesting period | 3 years | 5 years |  |  |  |  |  |  |  |  |  |
Common stock, conversion ratio (in shares) |  | 1 |  |  |  |  |  |  |  |  |  |
RSUs and restricted stock | Non-Employee Director |  |  |  |  |  |  |  |  |  |  |  |
Additional Disclosures |  |  |  |  |  |  |  |  |  |  |  |
Vesting period | 1 year | 5 years | 1 year |  |  |  |  |  |  |  |  |
Common stock, conversion ratio (in shares) |  |  |  |  |  |  |  |  |  |  | 1 | 1
Dividend equivalents |  |  |  |  |  |  |  |  |  |  |  |
Dividend Equivalents [Abstract] |  |  |  |  |  |  |  |  |  |  |  |
Reversal of dividend equivalents |  |  |  | 5,000 |  |  | $ 32,000 |  |  |  |  |
Reversal of dividend equivalents |  |  |  |  |  | (13,000) |  | (36,000) |  |  |  |
Paid during the period |  |  |  | 117,000 |  | $ 151,000 | 156,000 | $ 265,000 |  |  |  |
Carrying value at period end |  |  |  | $ 128,000 |  |  | $ 128,000 |  |  | $ 316,000 |  |

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
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