STOCK-BASED COMPENSATION (Details) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Sep. 30, 2013 Plan	Sep. 30, 2012	Sep. 30, 2011
Common-stock based award plan
Number of prior equity plans	1
Compensation expense (in dollars)	$ 23,271	$ 18,078	$ 12,101
Excess tax benefit from stock-based compensation	9,820	3,303	12,511
Stock options
Common-stock based award plan
The period from the grant date after which options expire	10 years
Compensation expense (in dollars)	11,512	9,791	7,224
Option vesting rights (as a percent)	25.00%
Weighted-average assumptions utilized in determining the fair value of options
Risk-free interest rate (as a percent)	0.70%	1.00%	1.90%
Expected stock volatility (as a percent)	53.90%	53.30%	51.60%
Dividend yield (as a percent)	1.10%	0.40%	0.50%
Expected term	5 years 6 months	5 years 6 months	5 years 6 months
Weighted-average fair value of options granted (in dollars per share)	$ 23.80	$ 27.70	$ 22.20
Options
Options outstanding at the beginning of the period (in shares)	4,690,000	4,589,000	5,572,000
Granted (in shares)	364,624	456,000	324,000
Exercised (in shares)	(1,057,000)	(314,000)	(1,289,000)
Forfeited/Expired (in shares)	(7,000)	(41,000)	(18,000)
Option outstanding at the end of the period (in shares)	3,991,000	4,690,000	4,589,000
Exercisable at the end of the period (in shares)	3,063,000	3,575,000	3,287,000
Shares available to grant	4,116,000	5,082,000	6,000,000
Weighted-Average Exercise Price
Outstanding at the beginning of the period (in dollars per share)	$ 29.56	$ 25.84	$ 22.82
Granted (in dollars per share)	$ 54.18	$ 59.68	$ 47.94
Exercised (in dollars per share)	$ 20.68	$ 17.24	$ 18.24
Forfeited/Expired (in dollars per share)	$ 52.32	$ 42.21	$ 34.06
Outstanding at the end of the period (in dollars per share)	$ 34.12	$ 29.56	$ 25.84
Exercisable at the end of the period (in dollars per share)	$ 28.48	$ 24.66	$ 22.35
Stock options | Minimum
Common-stock based award plan
Vesting period	1 year
Stock options | Maximum
Common-stock based award plan
Vesting period	4 years
Restricted stock
Common-stock based award plan
Number of shares granted	307,100	244,000	169,000
Compensation expense (in dollars)	$ 11,759	$ 8,287	$ 4,877
Restricted stock | Minimum
Common-stock based award plan
Vesting period	3 years
Restricted stock | Maximum
Common-stock based award plan
Vesting period	6 years