DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Sep. 30, 2013
Not designated but designed to manage exposure: | Foreign currency forwards
Derivative instruments and hedging activities
Notional Principal outstanding derivative instruments	$ 132,100	$ 128,100
Instruments designated as accounting hedges: | Foreign currency forwards
Derivative instruments and hedging activities
Notional Principal outstanding derivative instruments	249,628	231,051
Instruments designated as accounting hedges: | Forward starting swap
Derivative instruments and hedging activities
Notional Principal outstanding derivative instruments		58,415
Instruments not designated as accounting hedges: | Foreign currency forwards
Derivative instruments and hedging activities
Notional Principal outstanding derivative instruments	$ 136,955	$ 130,687