Consolidated Statements of Changes in Redeemable Noncontrolling Interests and Stockholders' Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)
Balance at Sep. 25, 2010	$ 699,245	$ 13,282	$ 473,749	$ 213,844	$ (1,630)
Balance (in shares) at Sep. 25, 2010		132,823,585
Increase (Decrease) in Stockholders' Equity
Sale of common stock for private placement	291,096	918	290,178
Sale of common stock for private placement (in shares)		9,174,991
Options exercised	11,380	284	11,096
Options exercised (in shares)		2,839,426
Issuance of common stock under employee stock purchase plan	5,948	15	5,933
Issuance of common stock under employee stock purchase plan (in shares)		148,917
Issuance of common stock for public equity offering	647,363	948	646,415
Issuance of common stock for public equity offering (in shares)		9,479,544
Stock compensation expense	10,361		10,361
Tax benefit from equity-based compensation plans	61,670		61,670
Deferred compensation expense	214		214
Adjustment of redeemable noncontrolling interests to redemption value	(1,618)			(1,618)
Other comprehensive income (loss), net of tax	(12,945)				(12,945)
Net income	199,501			199,501
Balance at Sep. 24, 2011	1,912,215	15,447	1,499,616	411,727	(14,575)
Balance (in shares) at Sep. 24, 2011		154,466,463
Increase (Decrease) in Stockholders' Equity
Options exercised	3,394	94	3,300
Options exercised (in shares)		940,369
Issuance of common stock under employee stock purchase plan	8,698	30	8,668
Issuance of common stock under employee stock purchase plan (in shares)		301,971
Restricted stock awards and units		5	(5)
Restricted stock awards and units (in shares)		55,747
Issuance of common stock under deferred compensation plan		4	(4)
Issuance of common stock under deferred compensation plan (in shares)		37,005
Repurchase of common stock	(76,470)	(312)	(76,158)
Repurchase of common stock (in shares)		(3,120,700)
Stock compensation expense	17,868		17,868
Tax benefit from equity-based compensation plans	11,064		11,064
Deferred compensation expense	211		211
Adjustment of redeemable noncontrolling interests to redemption value	(3,155)			(3,155)
Other comprehensive income (loss), net of tax	24,775				24,775
Net income	362,628			362,628
Balance at Sep. 29, 2012	2,261,228	15,268	1,464,560	771,200	10,200
Balance (in shares) at Sep. 29, 2012	152,680,855	152,680,855
Increase (Decrease) in Stockholders' Equity
Options exercised	19,817	285	19,532
Options exercised (in shares)		2,849,308
Issuance of common stock under employee stock purchase plan	9,960	34	9,926
Issuance of common stock under employee stock purchase plan (in shares)		343,678
Restricted stock awards and units		3	(3)
Restricted stock awards and units (in shares)		34,761
Repurchase of common stock	(188,278)	(564)	(187,714)
Repurchase of common stock (in shares)		(5,642,793)
Stock compensation expense	26,081		26,081
Tax benefit from equity-based compensation plans	54,706		54,706
Deferred compensation expense	234		234
Adjustment of redeemable noncontrolling interests to redemption value	(2,025)			(2,025)
Other comprehensive income (loss), net of tax	(29,385)				(29,385)
Net income	483,232			483,232
Balance at Sep. 28, 2013	$ 2,635,570	$ 15,026	$ 1,387,322	$ 1,252,407	$ (19,185)
Balance (in shares) at Sep. 28, 2013	150,265,809	150,265,809