Stock-Based Compensation (Performance Shares, RSUs, Restricted Stock and Share Unit Awards) (Details)				3 Months Ended				9 Months Ended
	Aug. 01, 2022	Jul. 31, 2022	Jul. 31, 2017	Apr. 30, 2024 USD ($) $ / shares shares	Jan. 31, 2024 $ / shares shares	Oct. 31, 2023 $ / shares shares	Apr. 30, 2023 USD ($)	Apr. 30, 2024 USD ($) $ / shares shares	Apr. 30, 2023 USD ($)	Jul. 31, 2023 USD ($)	Jul. 30, 2017
Dividend Equivalents [Abstract]
Reversal of dividend equivalents				$ 68,000			$ (22,000)	$ 104,000
Accrual of dividend equivalents									$ 342,000
Carrying value at period end				414,326,000				414,326,000		$ 445,727,000
Income tax (expense) benefit from settlement of stock-based awards				$ 76,000			(15,000)	$ (379,000)	(560,000)
Performance shares, RSUs, Restricted stock and share units
Awards (In Shares)
Outstanding, Beginning Balance (in shares) | shares				2,026,634	2,452,126	1,876,230		1,876,230
Granted (in shares) | shares						913,908
Settled (in shares) | shares				(9,642)	(383,565)	(296,198)
Canceled/Forfeited (in shares) | shares				(625,155)	(41,927)	(41,814)
Outstanding, Ending Balance (in shares) | shares				1,391,837	2,026,634	2,452,126		1,391,837
Vested, Ending Balance (in shares) | shares				451,975				451,975
Vested and Expected to Vest, Ending Balance (in shares) | shares				1,333,129				1,333,129
Weighted Average Grant Date Fair Value
Outstanding, Beginning Balance (in dollars per share) | $ / shares				$ 11.76	$ 11.60	$ 13.21		$ 13.21
Granted (in dollars per share) | $ / shares						9.93
Settled (in dollars per share) | $ / shares				14.10	10.64	16.03
Canceled/Forfeited (in dollars per share) | $ / shares				8.47	12.78	15.80
Outstanding, Ending Balance (in dollars per share) | $ / shares				13.22	$ 11.76	$ 11.60		13.22
Vested, Ending Balance (in dollars per share) | $ / shares				14.99				14.99
Vested and Expected to Vest, Ending Balance (in dollars per share) | $ / shares				$ 13.19				$ 13.19
Aggregate Intrinsic Value
Outstanding, Ending Balance				$ 2,616,653				$ 2,616,653
Vested, Ending Balance								849,713
Vested and Expected to Vest, Ending Balance				2,506,283				2,506,283
Additional Disclosures
Total intrinsic value relating to fully vested stock-based awards converted during the period				33,000			669,000	$ 7,478,000	3,633,000
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				68,000				$ 104,000
Accrual of dividend equivalents							22,000		342,000
Paid during the period				2,000			$ 13,000	267,000	$ 363,000
Carrying value at period end				$ 320,000				$ 320,000		$ 691,000