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. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Weighted average shares:
Weighted average common shares outstanding	50,900	51,771	50,929	51,881
Effect of dilutive securities outstanding	383	259	381	275
Diluted weighted average shares outstanding	51,283	52,030	51,310	52,156
Earnings (loss):
Income from continuing operations	$ 30,558	$ 30,353	$ 54,100	$ 60,517
Income from discontinued operations	8	300	8	300
Net income	$ 30,566	$ 30,653	$ 54,108	$ 60,817
Basic per share amounts:
Income from continuing operations	$ 0.60	$ 0.58	$ 1.06	$ 1.16
Income from discontinued operations	$ 0.00	$ 0.01	$ 0.00	$ 0.01
Net income	$ 0.60	$ 0.59	$ 1.06	$ 1.17
Diluted per share amounts:
Income from continuing operations	$ 0.60	$ 0.58	$ 1.05	$ 1.16
Income from discontinued operations	$ 0.00	$ 0.01	$ 0.00	$ 0.01
Net income	$ 0.60	$ 0.59	$ 1.05	$ 1.17