Fair Value Measurements (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jul. 02, 2016	Jul. 02, 2016	Sep. 30, 2015
Financial assets:
Cash equivalents—Level 1	$ 72,829	$ 72,829	$ 91,216
Available-for-sale Securities	44,606	44,606
Forward contracts	1,739	1,739	507
Financial assets, fair value	119,174	119,174	91,723
Financial liabilities:
Forward contracts	6,150	6,150	46
Contingent Consideration Liability, Fair Value Disclosure	19,497	19,497	13,000
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		1,097
Payment of contingent consideration		(11,500)
Liabilities, Fair Value Disclosure, Recurring	25,647	25,647	13,046
Level 1
Financial assets:
Cash equivalents—Level 1	72,829	72,829	91,216
Forward contracts	0	0	0
Financial assets, fair value	104,419	104,419	91,216
Financial liabilities:
Forward contracts	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
Available-for-sale Securities	0	0
Forward contracts	1,739	1,739	507
Financial assets, fair value	14,755	14,755	507
Financial liabilities:
Forward contracts	6,150	6,150	46
Contingent Consideration Liability, Fair Value Disclosure	0	0	0
Liabilities, Fair Value Disclosure, Recurring	6,150	6,150	46
Fair Value, Inputs, Level 3 [Member]
Financial assets:
Cash equivalents—Level 1	0	0	0
Forward contracts	0	0	0
Financial assets, fair value	0	0	0
Financial liabilities:
Forward contracts	0	0	0
Contingent Consideration Liability, Fair Value Disclosure	19,497	19,497	13,000
Liabilities, Fair Value Disclosure, Recurring	19,497	19,497	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	0	0
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		0
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	2,500	2,500
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		1,000
Payment of contingent consideration		(2,500)
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	16,997	16,997
Addition to Contingent Consideration		16,900
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability		97
acquired entity name-Kepware [Domain] | Fair Value, Inputs, Level 3 [Member]
Financial liabilities:
Contingent Consideration Liability, Fair Value Disclosure			$ 0
ThingWorx [Member]
Financial liabilities:
Payment of contingent consideration	(9,000)	(9,000)
Non-current portion [Member] [Member]
Financial liabilities:
Contingent Consideration Liability, Fair Value Disclosure	7,700	7,700
Certificates of Deposit [Member] | Level 2
Financial assets:
Available-for-sale Securities	680	680
Commercial Paper [Member] | Level 2
Financial assets:
Available-for-sale Securities	9,930	9,930
Corporate Bond Securities [Member] | Level 1
Financial assets:
Available-for-sale Securities	31,590	31,590
US Government Agencies Debt Securities [Member] | Level 2
Financial assets:
Available-for-sale Securities	$ 2,406	$ 2,406