Consolidated Statements Of Operations - USD ($) shares in Thousands, $ in Thousands		3 Months Ended		6 Months Ended
		Apr. 02, 2016	Apr. 04, 2015	Apr. 02, 2016	Apr. 04, 2015
Revenues [Abstract]
Subscription		$ 23,659	$ 15,765	$ 45,835	$ 29,988
Support		160,625	168,727	332,381	350,356
Total recurring software revenue		184,284	184,492	378,216	380,344
Perpetual license		39,689	70,187	87,452	134,935
Total software revenue		223,973	254,679	465,668	515,279
Professional services		48,654	59,440	97,976	124,282
Total revenue		272,627	314,119	563,644	639,561
Cost of revenue:
Cost of software revenue		38,613	34,518	75,427	69,243
Cost of professional services revenue		41,578	51,536	84,912	109,753
Total cost of revenue		80,191	86,054	160,339	178,996
Gross margin		192,436	228,065	403,305	460,565
Operating expenses:
Sales and marketing		87,177	83,865	169,606	173,349
Research and development		56,610	60,158	114,279	121,255
General and administrative		33,916	32,394	72,483	67,524
Amortization of acquired intangible assets		8,396	9,173	16,746	18,586
Restructuring charges		4,579	38,487	41,726	38,232
Total operating expenses		190,678	224,077	414,840	418,946
Operating income (loss)	[1]	1,758	3,988	(11,535)	41,619
Interest and other expense, net		(5,327)	(3,601)	(11,580)	(6,825)
Income (loss) before income taxes		(3,569)	387	(23,115)	34,794
Provision (benefit) for income taxes		1,604	(5,005)	5,950	(882)
Net income (loss)		$ (5,173)	$ 5,392	$ (29,065)	$ 35,676
Earnings(loss) per share—Basic (in USD per share)		$ (0.05)	$ 0.05	$ (0.25)	$ 0.31
Earnings(loss) per share—Diluted (in USD per share)		$ (0.05)	$ 0.05	$ (0.25)	$ 0.31
Weighted average shares outstanding—Basic (in shares)		114,563	114,944	114,354	115,147
Weighted average shares outstanding—Diluted (in shares)		114,563	115,922	114,354	116,479

[1] We recorded restructuring charges of $4.6 million and $41.7 million in the second quarter and first six months of 2016. Software Products included $3.7 million and $16.8 million, respectively; Services included $0.2 million and $5.0 million, respectively; sales and marketing expenses included $0.7 million and $16.6 million, respectively; and general and administrative expenses included $0.0 million and $3.3 million, respectively, of these restructuring charges. We recorded restructuring charges of $38.5 million in the second quarter of 2015. Software Products included $10.0 million; Services included $11.0 million; sales and marketing expenses included $12.9 million; and general and administrative expenses included $4.6 million of these restructuring charges. We recorded a credit to restructuring of $0.3 million in the first quarter of 2015 which is included in the Services segment.