Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended
		Jan. 02, 2016	Jan. 03, 2015
Revenues [Abstract]
Subscription		$ 22,176	$ 14,223
Support		171,756	181,629
Total recurring software revenue		193,932	195,852
Perpetual license		47,763	64,748
Total software revenue		241,695	260,600
Professional services		49,322	64,842
Total revenue		291,017	325,442
Cost of revenue:
Cost of software revenue		36,814	34,725
Cost of professional services revenue		43,333	58,217
Total cost of revenue		80,147	92,942
Gross margin		210,870	232,500
Operating expenses:
Sales and marketing		82,429	89,484
Research and development		57,669	61,097
General and administrative		38,567	35,130
Amortization of acquired intangible assets		8,350	9,413
Restructuring charges		37,147	(255)
Total operating expenses		224,162	194,869
Operating income (loss)	[1]	(13,292)	37,631
Interest and other expense, net		(6,253)	(3,224)
Income (loss) before income taxes		(19,545)	34,407
Provision for income taxes		4,347	4,123
Net income (loss)		$ (23,892)	$ 30,284
Earnings(loss) per share—Basic (in USD per share)		$ (0.21)	$ 0.26
Earnings(loss) per share—Diluted (in USD per share)		$ (0.21)	$ 0.26
Weighted average shares outstanding—Basic (in shares)		114,151	115,341
Weighted average shares outstanding—Diluted (in shares)		114,151	117,027

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