Summary Of Significant Accounting Policies (Financial Assets And Liabilities Measured At Fair Value On Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014		Sep. 30, 2013
Financial assets:
Cash equivalents	$ 101,113	[1]	$ 56,706	[1]
Forward contracts	339		301
Financial assets	101,452		57,007
Financial liabilities:
Contingent consideration related to ThingWorx acquisition	15,191		0
Forward contracts	911		438
Financial liabilities	16,102		438
Level 1 [Member]
Financial assets:
Cash equivalents	101,113	[1]	56,706	[1]
Forward contracts	0		0
Financial assets	101,113		56,706
Financial liabilities:
Contingent consideration related to ThingWorx acquisition	0
Forward contracts	0		0
Financial liabilities	0		0
Level 2 [Member]
Financial assets:
Cash equivalents	0		0
Forward contracts	339		301
Financial assets	339		301
Financial liabilities:
Contingent consideration related to ThingWorx acquisition	0
Forward contracts	911		438
Financial liabilities	911		438
Level 3 [Member]
Financial assets:
Cash equivalents	0		0
Forward contracts	0		0
Financial assets	0		0
Financial liabilities:
Contingent consideration related to ThingWorx acquisition	15,191
Forward contracts	0		0
Financial liabilities	$ 15,191		$ 0

[1] Money market funds and time deposits.