Fair Value Measurements (Reconciliation For Liabilities Measured At Fair Value On A Recurring Basis Using Significant Unobservable Inputs) (Details) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Tripit
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent consideration, period start		$ 0
Contingent consideration issued at business combination		17,395,000
Contingent consideration, period end		30,972,000
Tripit | Acquisition-Related Contingent Consideration [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value, included in earnings	(7,884,000)	4,034,000
Tripit | Acquisition-Related Contingent Consideration - Compensatory [Member]
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Change in fair value, included in earnings	(396,000)	9,543,000
GlobalExpense
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent consideration, period start	2,518,000	0
Contingent consideration issued at business combination		2,584,000
Change in fair value, included in earnings	610,000
Foreign currency translation	105,000	(66,000)
Consideration fully earned and recognized	(3,233,000)
Contingent consideration, period end	0	2,518,000
Top Up Payment Recorded As Liability | Tripit
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Contingent consideration, period end	$ 22,692,000