STOCKHOLDERS' EQUITY (Details 2) - RSUs - $ / shares		12 Months Ended
	Oct. 01, 2015	Sep. 30, 2015	Sep. 30, 2014
Number of Shares
Balance unvested at the beginning of the period (in shares)	759,902	642,949	421,369
Granted (in shares)		322,428	305,074
Vested (in shares)		(160,499)	(69,994)
Forfeited (in shares)		(44,976)	(13,500)
Balance unvested at the end of the period (in shares)		759,902	642,949
Weighted Average Grant-Date Fair Value
Balance unvested at the beginning of the period (in dollars per share)	$ 47.24	$ 43.76	$ 43.76
Granted (in dollars per share)		48.10	49.57
Vested (in dollars per share)		45.91	43.76
Forfeited (in dollars per share)		46.65	47.80
Balance unvested at the end of the period (in dollars per share)		$ 47.24	$ 43.76
Shares available for future grants		3,558,058
Subsequent event
Number of Shares
Vested (in shares)	(116,178)