Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Apr. 02, 2011	Mar. 31, 2012	Apr. 02, 2011
Revenue:
License	$ 74,779	$ 74,215	$ 163,867	$ 149,688
Service	226,346	194,974	455,534	386,053
Total revenue	301,125	269,189	619,401	535,741
Costs and expenses:
Cost of license revenue	7,824	6,558	15,483	12,512
Cost of service revenue	85,392	75,213	175,952	155,320
Total cost of revenue	93,216	81,771	191,435	167,832
Gross margin	207,909	187,418	427,966	367,909
Sales and marketing	90,962	81,163	188,740	165,684
Research and development	54,576	53,051	109,569	104,573
General and administrative	29,534	24,712	59,106	48,196
Amortization of acquired intangible assets	5,132	4,266	10,341	8,120
Restructuring charges	20,802	0	20,802	0
Total costs and expenses	201,006	163,192	388,558	326,573
Operating income	6,903	24,226	39,408	41,336
Interest and other (expense) income, net	(2,967)	(822)	(5,610)	(2,708)
Income before income taxes	3,936	23,404	33,798	38,628
Provision for income taxes	367	4,387	8,106	6,351
Net income	$ 3,569	$ 19,017	$ 25,692	$ 32,277
Earnings per share-Basic	$ 0.03	$ 0.16	$ 0.22	$ 0.27
Earnings per share-Diluted	$ 0.03	$ 0.16	$ 0.21	$ 0.27
Weighted average shares outstanding-Basic	119,003	118,194	118,356	117,501
Weighted average shares outstanding-Diluted	121,401	121,502	120,985	121,317