Goodwill and Intangible Assets (Amortization Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Dec. 31, 2011	Jan. 01, 2011
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 5,209	$ 3,854
Cost of license revenue	4,103	3,363
Total amortization expense	$ 9,312	$ 7,217

Aggregate amount of intangible asset amortization recognized as expense during the period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 142

-Paragraph 45

-Subparagraph a(2)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=6905858&loc=d3e16323-109275

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration