Goodwill (Schedule) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended						12 Months Ended
	Sep. 30, 2012		Sep. 30, 2011		Sep. 30, 2011 Tripit	Jan. 24, 2011 Tripit	Sep. 30, 2012 Etap On Line Member		Sep. 30, 2011 Etap On Line Member		Sep. 30, 2012 GlobalExpense		Sep. 30, 2011 GlobalExpense	Jun. 30, 2011 GlobalExpense
Goodwill [Roll Forward]
Goodwill, period start	$ 279,192		$ 194,989
Addition					69,205								12,000
Goodwill, purchase accounting adjustments							2,697	[1]	3,968	[1]
Goodwill purchase accounting allocation adjustment											1,135	[2]
Goodwill, translation adjustments	(1,132)	[3]	(970)	[3]
Goodwill, period end	281,892		279,192
Business acquisition, cost of acquired entity						$ 86,809								$ 21,810
Business acquisition earn out performance period							3 years

[1] On August 1, 2009, we completed the acquisition of Etap-On-Line (“Etap Acquisition”). The purchase price is subject to specified earn out provisions to be determined over a three year period ending September 30, 2012. We consider the earn-out amounts as additional contingent consideration and record them in goodwill as incurred. We recorded a $2.7 million and $4.0 million earn-out as additional goodwill for 2012 and 2011.

[2] In the fourth quarter of 2011, we completed the acquisition of GlobalExpense for total consideration of $21.8 million. We finalized our purchase price allocation in 2012. Goodwill increased by $1.1 million as a result of the finalization of purchase price allocation.

[3] Other adjustments represent primarily the impact of foreign currency translation for instances when goodwill is recorded in foreign entities whose functional currency is also their local currency. These goodwill balances are translated into U.S. dollars using exchange rates in effect at period end. Adjustments are included in other comprehensive income (loss).