Stock-Based Compensation (Stock Options) (Details) - Stock options - USD ($)	3 Months Ended		6 Months Ended
	Jan. 31, 2021	Oct. 31, 2020	Jan. 31, 2021
Awards (In Shares)
Outstanding, Beginning Balance (in shares)	1,344,635	1,422,025	1,422,025
Expired/canceled (in shares)	(12,800)	(77,390)
Outstanding, Ending Balance (in shares)	1,331,835	1,344,635	1,331,835
Exercisable, Ending Balance (in shares)	1,003,835		1,003,835
Vested and Expected to Vest, Ending Balance (in shares)	1,319,141		1,319,141
Weighted Average Exercise Price (Per Share)
Outstanding, Beginning Balance (in dollars per share)	$ 25.95	$ 26.17	$ 26.17
Expired/canceled (in dollars per share)	25.86	29.90
Outstanding, Ending Balance (in dollars per share)	25.96	$ 25.95	25.96
Exercisable, Ending Balance (in dollars per share)	28.58		28.58
Vested and Expected to Vest, Ending Balance (in dollars per share)	$ 26.03		$ 26.03
Weighted Average Remaining Contractual Term (Years)
Outstanding, Ending Balance			4 years 2 months 4 days
Exercisable, Ending Balance			2 years 6 months 3 days
Vested And Expected To Vest, Ending Balance			4 years 1 month 17 days
Aggregated Intrinsic Value
Outstanding, Ending Balance	$ 1,121,000		$ 1,121,000
Exercisable, Ending Balance	1,000		1,000
Vested and Expected to Vest, Ending Balance	$ 1,078,000		$ 1,078,000
Additional Disclosures
Exercise price, lower range limit (in dollars per share)			$ 17.88
Exercise price, upper range limit (in dollars per share)			$ 33.94
Minimum
Additional Disclosures
Contractual term (in years)			5 years
Maximum
Additional Disclosures
Contractual term (in years)			10 years
Tranche One
Additional Disclosures
Vesting period (in years)			3 years
Tranche Two
Additional Disclosures
Vesting period (in years)			5 years