Consolidated Statement of Changes in Redeemable Noncontrolling Interests and Stockholders' Equity (USD $) In Thousands, except Share data	Equity Attributable to Redeemable Noncontrolling Interests [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance, value at Sep. 25, 2010		$ 13,282	$ 473,749	$ 213,844	$ (1,630)	$ 699,245
Balance, shares at Sep. 25, 2010		132,823,585
Sale of common stock, shares		9,174,991
Sale of common stock, value		918	290,178			291,096
Options exercised, shares		1,472,433
Options exercised, value		147	6,425			6,572
Issuance of common stock under employee stock purchase plan, shares		93,892
Issuance of common stock under employee stock purchase plan, value		9	2,996			3,005
Issuance of common stock for public equity offering, shares		9,479,544
Issuance of common stock for public equity offering, value		948	646,415			647,363
Stock compensation expense			7,520			7,520
Tax benefit from exercise of options			29,213			29,213
Deferred compensation expense			166			166
Purchase noncontrolling interests	19,118
Adjustment of redeemable noncontrolling interests to redemption value	976			(976)		(976)
Cash distributions	(702)					(702)
Other comprehensive income, net of tax	260				9,310	9,310
Net income	1,095			124,132		124,132
Balance, value at Jun. 25, 2011	$ 20,747	$ 15,304	$ 1,456,662	$ 337,000	$ 7,680	$ 1,816,646
Balance, shares at Jun. 25, 2011		153,044,445