Description of Business and Basis of Presentation Disclosure Fair Value Unbservable Inputs (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Sep. 30, 2014		Dec. 30, 2013	Sep. 30, 2013
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	$ 101,113	[1]		$ 56,706	[1]
Business Combination, Contingent Consideration, Liability	13,048		13,048
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	2,143
Contingent consideration related to ThingWorx acquisition	15,191			0
Fair Value, Inputs, Level 1 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	101,113	[1]		56,706	[1]
Contingent consideration related to ThingWorx acquisition	0
Level 3 [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Cash and Cash Equivalents, Fair Value Disclosure	0			0
Contingent consideration related to ThingWorx acquisition	$ 15,191

[1] Money market funds and time deposits.