Goodwill and Intangible Assets (Tables)

9 Months Ended

Apr. 30, 2018

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Changes in Carrying Amount of Goodwill

Changes in the carrying amount of goodwill for the nine months ended April 30, 2018, were as follows:

	IDS			WPS		Total
Balance as of July 31, 2017	$	391,864		$	45,833	$	437,697
Translation adjustments	(2,392		)	121		(2,271		)
Balance as of April 30, 2018	$	389,472		$	45,954	$	435,426

Other Intangible Assets

The net book value of these assets was as follows:

	April 30, 2018								July 31, 2017
	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	$	1,448	$	(816	)	$	632	5	$	1,358	$	(471	)	$	887
Trademarks and other	9	4,593		(4,449		)	144		9	4,528		(4,229		)	299
Customer relationships	8	60,742		(36,336		)	24,406		8	60,759		(31,909		)	28,850
Unamortized other intangible assets:
Trademarks	N/A	22,854		—			22,854		N/A	23,040		—			23,040
Total		$	89,637	$	(41,601	)	$	48,036		$	89,685	$	(36,609	)	$	53,076