Earnings Per Share (Computation Of Earnings Per Share) (Details) (USD $) In Thousands, except Per Share data	3 Months Ended	9 Months Ended
Oct. 01, 2011	Oct. 02, 2010	Oct. 01, 2011	Oct. 02, 2010
Earnings Per Share [Abstract]
Weighted average common shares outstanding	53,339	56,739	54,405	57,405
Effect of dilutive securities outstanding	289	259	365	252
Diluted weighted average shares outstanding	53,628	56,998	54,770	57,657
Income from continuing operations	$ 34,187	$ 27,247	$ 97,484	$ 74,979
Income (loss) from discontinued operations	10,814	(1,096)	42,115	(1,418)
Net income	$ 45,001	$ 26,151	$ 139,599	$ 73,561
Income from continuing operations, basic per share	$ 0.64	$ 0.48	$ 1.79	$ 1.30
Income (loss) from discontinued operations, basic per share	$ 0.20	$ (0.02)	$ 0.77	$ (0.02)
Net income, basic per share	$ 0.84	$ 0.46	$ 2.56	$ 1.28
Income from continuing operations, diluted per share	$ 0.64	$ 0.48	$ 1.78	$ 1.30
Income (loss) from discontinued operations, diluted per share	$ 0.20	$ (0.02)	$ 0.77	$ (0.02)
Net income, diluted per share	$ 0.84	$ 0.46	$ 2.55	$ 1.28

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

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