Earnings Per Share (Computation Of Earnings Per Share) (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jul. 02, 2011	Jun. 30, 2012	Jul. 02, 2011
Earnings Per Share [Line Items]
Weighted average common shares outstanding	51,771	54,546	51,881	54,981
Effect of dilutive securities outstanding	259	412	275	414
Diluted weighted average shares outstanding	52,030	54,958	52,156	55,395
Income from continuing operations	$ 30,353	$ 33,169	$ 60,517	$ 63,297
Income (loss) from discontinued operations	300	(205)	300	31,301
Net income	$ 30,653	$ 32,964	$ 60,817	$ 94,598
Income from continuing operations, Basic per share amounts	$ 0.58	$ 0.60	$ 1.16	$ 1.15
Income (loss) from discontinued operations, Basic per share amounts	$ 0.01	$ 0.00	$ 0.01	$ 0.57
Net income, Basic per share amounts	$ 0.59	$ 0.60	$ 1.17	$ 1.72
Income from continuing operations, Diluted per share amounts	$ 0.58	$ 0.60	$ 1.16	$ 1.14
Income (loss) from discontinued operations, Diluted per share amounts	$ 0.01	$ 0.00	$ 0.01	$ 0.57
Net income, Diluted per share amounts	$ 0.59	$ 0.60	$ 1.17	$ 1.71