STOCKHOLDERS' EQUITY (Details) (USD $)	12 Months Ended			0 Months Ended	12 Months Ended	0 Months Ended	12 Months Ended
	Sep. 30, 2014 RSUs	Sep. 30, 2013 RSUs	Sep. 30, 2014 RSUs Expected	Mar. 21, 2013 Time-based RSUs	Sep. 30, 2014 Time-based RSUs item	Mar. 21, 2013 Performance-based RSUs	Sep. 30, 2014 Performance-based RSUs
Stockholders' Equity
Number of units awarded (in shares)	305,074	426,511		416,929		314,656
Number of units awarded (in shares)	731,585
Number of equal installments for vesting of stock awards					4
Vesting period							3 years
Awards vested (in shares)	69,994		345,240
Weighted-average grant date fair value (in dollars per share)	$ 46.43	$ 43.76