DEBT (Details) (USD $)					3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Revolving credit facility Years	Oct. 31, 2011 Revolving credit facility	Dec. 31, 2011 Revolving credit facility Minimum [Member]	Dec. 31, 2011 Revolving credit facility Maximum [Member]	Oct. 31, 2011 Revolving credit facility Rate 2C [Member] Minimum [Member]	Oct. 31, 2011 Revolving credit facility Rate 2C [Member] Maximum [Member]	Oct. 31, 2011 LIBOR Revolving credit facility Rate 1 [Member] Minimum [Member]	Oct. 31, 2011 LIBOR Revolving credit facility Rate 1 [Member] Maximum [Member]	Oct. 31, 2011 LIBOR Revolving credit facility Rate 2C [Member]	Oct. 31, 2011 Federal funds rate Revolving credit facility Rate 2B [Member]
Debt Instrument
Revolving credit facility				$ 1,000,000,000
Period of revolving credit facility (in years)			5
Debt Instrument, Applicable Margin Over Variable Rate							0.00%	0.50%	1.00%	1.50%
Debt Instrument, Basis Spread on Variable Rate											1.00%	0.50%
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage					0.10%	0.25%
Letters of credit, maximum amount issuable under credit facility				100,000,000
Line of Credit Facility Revolving Credit, Maximum Amount of Swingline Loans to be Issued				50,000,000
Letters of Credit Outstanding, Amount	$ 1,900,000	$ 1,900,000