Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended
	Jul. 31, 2015	Apr. 02, 2016	Jan. 02, 2016	Apr. 02, 2016	Apr. 04, 2015	Sep. 30, 2015
Financial assets:
Cash equivalents—Level 1		$ 78,693		$ 78,693		$ 91,216
Forward contracts (2)		669		669		507
Financial assets, fair value		79,362		79,362		91,723
Financial liabilities:
Forward contracts (2)		6,049		6,049		46
Contingent Consideration Liability, Fair Value Disclosure		29,190		29,190		13,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		540
Liabilities, Fair Value Disclosure, Recurring		35,239		35,239		13,046
Level 1
Financial assets:
Cash equivalents—Level 1		78,693		78,693		91,216
Forward contracts (2)		0		0		0
Financial assets, fair value		78,693		78,693		91,216
Financial liabilities:
Forward contracts (2)		0		0		0
Contingent Consideration Liability, Fair Value Disclosure		0		0		0
Liabilities, Fair Value Disclosure, Recurring		0		0		0
Level 2
Financial assets:
Cash equivalents—Level 1		0		0		0
Forward contracts (2)		669		669		507
Financial assets, fair value		669		669		507
Financial liabilities:
Forward contracts (2)		6,049		6,049		46
Contingent Consideration Liability, Fair Value Disclosure		0		0		0
Liabilities, Fair Value Disclosure, Recurring		6,049		6,049		46
Fair Value, Inputs, Level 3 [Member]
Financial assets:
Cash equivalents—Level 1		0		0		0
Forward contracts (2)		0		0		0
Financial assets, fair value		0		0		0
Financial liabilities:
Forward contracts (2)		0		0		0
Contingent Consideration Liability, Fair Value Disclosure		29,190		29,190		13,000
Liabilities, Fair Value Disclosure, Recurring		29,190		29,190		13,000
Current portion [Member]
Financial liabilities:
Contingent Consideration Liability, Fair Value Disclosure		0		0
acquired entity name-ThingWorx [Member]
Financial liabilities:
Contingent Consideration Liability, Fair Value Disclosure		9,000		9,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability				0
Payment of contingent consideration	$ (9,000)
acquired entity name-ThingWorx [Member] | Fair Value, Inputs, Level 3 [Member]
Financial liabilities:
Contingent Consideration Liability, Fair Value Disclosure						9,000
Acquired entity name: ColdLight [Member]
Financial liabilities:
Contingent Consideration Liability, Fair Value Disclosure		3,290		3,290
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		540
Payment of contingent consideration			$ (1,250)	(1,250)	$ 0
Acquired entity name: ColdLight [Member] | Fair Value, Inputs, Level 3 [Member]
Financial liabilities:
Contingent Consideration Liability, Fair Value Disclosure						4,000
acquired entity name-Kepware [Domain]
Financial liabilities:
Contingent Consideration Liability, Fair Value Disclosure		16,900		16,900
acquired entity name-Kepware [Domain] | Fair Value, Inputs, Level 3 [Member]
Financial liabilities:
Contingent Consideration Liability, Fair Value Disclosure						$ 0
Non-current portion [Member] [Member]
Financial liabilities:
Contingent Consideration Liability, Fair Value Disclosure		$ 17,700		$ 17,700