Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jul. 31, 2015		Jul. 31, 2014		Jul. 31, 2013
Net revenue:
Product	$ 531,161		$ 509,527		$ 526,725
Engineering	9,130		8,021		23,638
Total net revenue	540,291		517,548		550,363
Cost of sales:
Product	302,974		290,951		313,458
Engineering	7,830		6,894		20,226
Total cost of sales	310,804		297,845		333,684
Gross profit	229,487		219,703		216,679
Operating expenses:
Research and product development	68,462		73,828		63,990
Selling and marketing	63,489		59,157		51,268
General and administrative	57,291		54,147		52,527
Restructuring	(354)	[1],[2]	3,483	[1],[2]	3,519
Total operating expenses	188,888		190,615		171,304
Income from operations	40,599		29,088		45,375
Other income (expense):
Interest income, net	73		253		371
(Loss) on sale of other investments			(484)
Other income (expense), net	361		181		(1,649)
Total other expense, net	434		(50)		(1,278)
Income before income taxes	41,033		29,038		44,097
Provision for (benefit from) income taxes	7,552		(5,442)		12,976
Net income	$ 33,481		$ 34,480		$ 31,121
Net income per common share:
Basic	$ 2.70		$ 2.78		$ 2.54
Diluted	$ 2.66		$ 2.72		$ 2.48
Weighted average shares outstanding:
Basic	12,407		12,404		12,247
Diluted	12,606		12,667		12,569
Dividends declared and paid per share	$ 0.40		$ 0.40		$ 0.40

[1] Activity in fiscal year 2014 pertains to both the Fiscal Year 2014 Restructuring Plan and the 2013 Restructuring Plan. In fiscal year 2014, the restructuring charges of $2.9 million relate to the Fiscal Year 2014 Restructuring Plan, while restructuring charges of $0.6 million and cash payments of ($2.5) million relate to the Fiscal Year 2013 Restructuring Plan.

[2] Activity in fiscal year 2015 pertains to both the Fiscal Year 2014 Restructuring Plan and the 2013 Restructuring Plan. In fiscal year 2015, the restructuring adjustments of ($0.3) million and cash payments of ($2.4) million relate to the Fiscal Year 2014 Restructuring Plan, while restructuring adjustments of ($0.1) million and cash payments of ($0.5) million relate to the Fiscal Year 2013 Restructuring Plan.