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Stock Repurchases (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 25, 2010	Dec. 26, 2009
Number of shares
Repurchased at beginning of period	9,771,503	8,669,795	8,460,949
2009 Repurchases	760,036	1,101,708	208,846
Repurchased at end of period	10,531,539	9,771,503	8,669,795
Aggregate Purchase Price
Repurchased at beginning balance	$ 189,072	$ 121,091	$ 114,011
2009 Repurchases	62,824	67,981	7,080
Repurchased at end of period	$ 251,896	$ 189,072	$ 121,091

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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