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. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Weighted average shares:
Weighted average common shares outstanding	50,606	50,900	50,509	50,929
Effect of dilutive securities outstanding	672	383	620	381
Diluted weighted average shares outstanding	51,278	51,283	51,129	51,310
Earnings (loss):
Income from continuing operations	$ 27,557	$ 30,558	$ 69,163	$ 54,100
Income from discontinued operations	0	8	0	8
Net income	$ 27,557	$ 30,566	$ 69,163	$ 54,108
Basic per share amounts:
Income from continuing operations	$ 0.54	$ 0.60	$ 1.37	$ 1.06
Income from discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Net income	$ 0.54	$ 0.60	$ 1.37	$ 1.06
Diluted per share amounts:
Income from continuing operations	$ 0.54	$ 0.60	$ 1.35	$ 1.05
Income from discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Net income	$ 0.54	$ 0.60	$ 1.35	$ 1.05