DERIVATIVE INSTRUMENTS (Details) (USD $)									3 Months Ended
	Dec. 31, 2011 Senior notes, 4.5 percent due 2021	Dec. 31, 2011 Forward exchange contracts	Dec. 31, 2011 Interest-rate swap Senior notes, 4.5 percent due 2021	Dec. 31, 2011 Derivatives not designated as hedging instruments	Dec. 31, 2010 Derivatives not designated as hedging instruments	Dec. 31, 2010 Derivatives not designated as hedging instruments Currency swaps	Dec. 31, 2011 Derivatives not designated as hedging instruments Forward exchange contracts	Dec. 31, 2010 Derivatives not designated as hedging instruments Forward exchange contracts	Dec. 31, 2011 Derivatives designated as hedging instruments Interest-rate swap agreement
Derivative Instruments
Notional amounts of derivatives						$ 86,400,000	$ 9,800,000	$ 12,000,000	$ 400,000,000
Number of swap agreements									4
Debt instrument, face amount	400,000,000
Fixed-rate (as a percent)									4.50%
Reference rate for variable rate									six-month London Interbank Offered Rate (LIBOR)
Net settlement benefit due to reset of variable rates semi-annually at each net settlement date									1,600,000
Derivative maturity period, less than		6 months
Asset Derivatives			3,268,000	3,325,000	90,000		57,000	90,000	3,268,000
Liability Derivatives				$ 60,000	$ 1,445,000	$ 1,368,000	$ 60,000	$ 77,000