Goodwill and Other Intangible Assets Schedule of Other Intangible Assets (Tables)

12 Months Ended

Jul. 31, 2017

Other Intangible Assets [Abstract]

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

Other Intangible Assets

Other intangible assets include patents, tradenames, customer relationships, non-compete agreements and other intangible assets with finite lives being amortized in accordance with the accounting guidance for other intangible assets. The net book value of these assets was as follows:

	July 31, 2017								July 31, 2016
	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:
Patents	5	$	1,358	$	(471	)	$	887	5	$	12,252	$	(11,063	)	$	1,189
Tradenames and other	9	4,528		(4,229		)	299		5	14,359		(13,709		)	650
Customer relationships	8	60,759		(31,909		)	28,850		7	135,795		(100,830		)	34,965
Non-compete agreements and other	N/A	—		—			—		4	9,153		(9,142		)	11
Unamortized other intangible assets:
Tradenames	N/A	23,040		—			23,040		N/A	22,991		—			22,991
Total		$	89,685	$	(36,609	)	$	53,076		$	194,550	$	(134,744	)	$	59,806