Intangible Assets, Goodwill and Other (Tables)

12 Months Ended

Jul. 31, 2020

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Finite-Lived Intangible Assets [Table Text Block]

The net book value of these assets was as follows: 

	July 31, 2020							July 31, 2019
	Weighted Average Amortization Period (Years)	Gross Carrying Amount		Accumulated Amortization		Net Book Value		Weighted Average Amortization Period (Years)	Gross Carrying Amount		Accumulated Amortization		Net Book Value
Amortized other intangible assets:
Customer relationships and other	9	$	45,385	$	(32,670)	$	12,715	9	$	46,595	$	(29,343)	$	17,252
Unamortized other intangible assets:
Tradenames	N/A	9,619		—		9,619		N/A	18,871		—		18,871
Total		$	55,004	$	(32,670)	$	22,334		$	65,466	$	(29,343)	$	36,123