Derivative Instruments and Hedging Activities (Details 3) (USD $)	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Derivative instruments and hedging activities
Estimated unrealized net gains (losses) from cash flow hedges which are expected to be reclassified into earnings in the next twelve months	$ 300,000		$ 300,000
Foreign currency forwards
Derivative instruments and hedging activities
Gains (losses) recognized in OCI	5,912,000	177,000	4,020,000	(5,395,000)
Gains (losses) reclassified into earnings - Effective Portion	289,000	2,158,000	(1,763,000)	(6,688,000)
Forward starting swap
Derivative instruments and hedging activities
Gains (losses) recognized in OCI	$ 1,617,000		$ 1,453,000