Other Intangible Assets (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Oct. 31, 2020	Apr. 30, 2021	Jul. 31, 2020
Other Intangible Assets [Line Items]
Intangible Assets, Gross (Excluding Goodwill)		$ 55,311	$ 55,004
Finite-Lived Intangible Assets, Accumulated Amortization		(36,783)	(32,670)
Other intangible assets		$ 18,528	22,334
Customer relationships and tradenames
Other Intangible Assets [Line Items]
Weighted Average Amortization Period	9 years	9 years
Finite-Lived Intangible Assets, Gross		$ 45,497	45,385
Finite-Lived Intangible Assets, Accumulated Amortization		(36,783)	(32,670)
Finite-Lived Intangible Assets, Net		8,714	12,715
Tradenames
Other Intangible Assets [Line Items]
Indefinite-lived Intangible Assets - Tradenames		$ 9,814	$ 9,619