Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2021	Jan. 31, 2020	Jul. 31, 2020
Other Intangible Assets [Line Items]
Weighted Average Amortization Period			9 years		9 years
Finite-Lived Intangible Assets, Gross	$ 45,498		$ 45,498		$ 45,385
Indefinite-lived Intangible Assets (Excluding Goodwill)	9,742		9,742		9,619
Net Book Value	19,809		19,809		22,334
Intangible Assets, Gross (Excluding Goodwill)	55,240		55,240		55,004
Finite-Lived Intangible Assets, Accumulated Amortization	(35,431)		(35,431)		(32,670)
Finite-Lived Intangible Assets, Net	10,067		10,067		$ 12,715
Amortization of Intangible Assets	1,353	$ 1,291	2,704	$ 2,582
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	5,407		5,407
Finite-Lived Intangible Assets, Amortization Expense, Year Two	5,123		5,123
Finite-Lived Intangible Assets, Amortization Expense, Year Three	$ 2,241		$ 2,241