Earnings Per Share (Computation Of Earnings Per Share) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 29, 2012	Oct. 01, 2011	Sep. 29, 2012	Oct. 01, 2011
Earnings Per Share [Line Items]
Weighted average common shares outstanding	51,566	53,339	51,775	54,405
Effect of dilutive securities outstanding	243	289	266	365
Diluted weighted average shares outstanding	51,809	53,628	52,041	54,770
Income from continuing operations	$ 26,581	$ 34,187	$ 87,098	$ 97,484
Income from discontinued operations	516	10,814	816	42,115
Net income	$ 27,097	$ 45,001	$ 87,914	$ 139,599
Income from continuing operations, Basic per share amounts	$ 0.52	$ 0.64	$ 1.68	$ 1.79
Income from discontinued operations, Basic per share amounts	$ 0.01	$ 0.20	$ 0.02	$ 0.77
Net income, Basic per share amounts	$ 0.53	$ 0.84	$ 1.70	$ 2.56
Income from continuing operations, Diluted per share amounts	$ 0.51	$ 0.64	$ 1.67	$ 1.78
Income from discontinued operations, Diluted per share amounts	$ 0.01	$ 0.20	$ 0.02	$ 0.77
Net income, Diluted per share amounts	$ 0.52	$ 0.84	$ 1.69	$ 2.55