DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012
Forward starting swap
Derivative instruments and hedging activities
Notional Principal outstanding derivative instruments	$ 58,400
Instruments designated as accounting hedges: | Foreign currency forwards
Derivative instruments and hedging activities
Notional Principal outstanding derivative instruments	361,337	382,500
Instruments designated as accounting hedges: | Forward starting swap
Derivative instruments and hedging activities
Notional Principal outstanding derivative instruments	58,415	58,415
Instruments not designated as accounting hedges: | Foreign currency forwards
Derivative instruments and hedging activities
Notional Principal outstanding derivative instruments	$ 2,697	$ 5,945