Earnings Per Share (Details) (USD $) In Thousands, except Per Share data	3 Months Ended	6 Months Ended
Jul. 02, 2011	Jul. 03, 2010	Jul. 02, 2011	Jul. 03, 2010
Earnings Per Share
Net income	$ 59,731	$ 67,727	$ 116,041	$ 138,055
Weighted average shares	159,383	162,325	159,931	163,747
Basic EPS	$ 0.37	$ 0.42	$ 0.73	$ 0.84
Weighted average shares, including the dilutive effect of stock-based awards (3,290 and 3,112 for the thirteen weeks ended July 2, 2011 and July 3, 2010, respectively, and 3,897 and 3,322 for the twenty-six weeks ended July 2, 2011 and July 3, 2010, respectively)	162,673	165,437	163,828	167,069
Diluted EPS	$ 0.37	$ 0.41	$ 0.71	$ 0.83

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The amount of net income or loss for the period per each share of common stock outstanding during the reporting period.

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The amount of net income or loss for the period per each share of common stock and dilutive common stock equivalents outstanding during the reporting period.

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The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes.

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The average number of shares issued and outstanding that are used in calculating diluted EPS, determined based on the timing of issuance of shares in the period.

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Number of [basic] shares, after adjustment for contingently issuable shares and other shares not deemed outstanding, determined by relating the portion of time within a reporting period that common shares have been outstanding to the total time in that period.

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