Acquisition (Business Combination) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended		12 Months Ended
	Jul. 04, 2015	Jun. 28, 2014	Mar. 29, 2014	Jul. 04, 2015	Jun. 28, 2014	May. 06, 2017	May. 06, 2016	Sep. 30, 2015
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Acquisition-related cost	$ 2,800	$ 1,300		$ 8,700	$ 6,400
Payments to Acquire Businesses, Net of Cash Acquired				98,411	111,519
Borrowings under credit facility				135,000	$ 474,375
Acquired entity name: ColdLight [Member]
Acquired entity Name
Goodwill, Acquired During Period	$ 85,288			85,288
Business Acquisition, Effective Date of Acquisition	May 07, 2015
Finite-lived Intangible Assets Acquired	$ 17,620
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, Low	3,800
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Payments to Acquire Businesses, Net of Cash Acquired	98,592
Cash Acquired from Acquisition	1,313
Business Combination, Consideration Transferred	102,392
business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value High	5,000			5,000
Contingent consideration	3,800			3,800
Increase in estimated fair value of liability				3,800
Business acquisition, acquired net assets excluding goodwill, intangible assets and cash	(516)
acquired entity name-ThingWorx [Member]
Acquired entity Name
Finite-lived Intangible Assets Acquired			$ 32,100
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Payments to Acquire Businesses, Net of Cash Acquired			111,500
Cash Acquired from Acquisition			$ 100
business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value High	18,000			18,000
Increase in estimated fair value of liability				$ 2,809
Computer Software, Intangible Asset [Member]
Acquired entity Name
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				9 years
Computer Software, Intangible Asset [Member] | Acquired entity name: ColdLight [Member]
Acquired entity Name
Finite-lived Intangible Assets Acquired	$ 13,600
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	10 years
Customer Lists [Member]
Acquired entity Name
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life				10 years
Customer Lists [Member] | Acquired entity name: ColdLight [Member]
Acquired entity Name
Finite-lived Intangible Assets Acquired	$ 3,500
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	9 years
Trademarks and Trade Names [Member] | Acquired entity name: ColdLight [Member]
Acquired entity Name
Finite-lived Intangible Assets Acquired	$ 500
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	7 years
Number of Employees, Total [Member] | Acquired entity name: ColdLight [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Business Acquisition, Description of Acquired Entity, Number of Employee Acquired	60
Scenario, Forecast [Member] | Acquired entity name: ColdLight [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities [Abstract]
Max contingent consideration can be earned						$ 2,000	$ 3,000
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period								$ 8,000