Goodwill and Intangible Assets (Amortization of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
Apr. 04, 2015	Mar. 29, 2014	Apr. 04, 2015	Mar. 29, 2014
Goodwill and Intangible Assets Disclosure [Abstract]
Amortization of acquired intangible assets	$ 9,173	$ 7,985	$ 18,586	$ 15,774
Cost of license and subscriptions solutions revenue	4,714	4,407	9,481	8,904
Total amortization expense	$ 13,887us-gaap_AmortizationOfIntangibleAssets	$ 12,392us-gaap_AmortizationOfIntangibleAssets	$ 28,067us-gaap_AmortizationOfIntangibleAssets	$ 24,678us-gaap_AmortizationOfIntangibleAssets

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

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-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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