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Stock Repurchases (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Dec. 25, 2010
Number of shares
Repurchased at beginning of period	10,531,539	9,771,503	8,669,795
Repurchases	165,192	760,036	1,101,708
Repurchased at end of period	10,696,731	10,531,539	9,771,503
Aggregate Purchase Price
Repurchased at beginning balance	$ 251,896	$ 189,072	$ 121,091
Repurchases	18,047	62,824	67,981
Repurchased at end of period	$ 269,942	$ 251,896	$ 189,072

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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