Derivative Instruments (Details) - Schedule of derivative instruments designated as hedges of the net investment in a foreign operation (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Derivatives Disclosure [Abstract]
Weighted average of U.S. dollar equivalent of foreign denominated net assets	$ 1,962,076		$ 1,733,555
Derivative gains (losses)	$ (36,649)	[1]	$ 36,836	[1]

[1] Derivative gains (losses) from derivative instruments designated as hedges of the net investment in a foreign operation are recorded in the cumulative translation adjustment account within AOCI for each period.