Earnings Per Share - Computation of Earnings Per Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 30, 2013	Mar. 31, 2012
Weighted average shares:
Weighted average common shares outstanding	50,980	51,998
Effect of dilutive securities outstanding	386	303
Diluted weighted average shares outstanding	51,366	52,301
Basic per share amounts:
Net income	$ 23,542	$ 30,164
Weighted average common shares outstanding	50,980	51,998
Per share amount	$ 0.46	$ 0.58
Diluted per share amounts:
Net income	$ 23,542	$ 30,164
Diluted weighted average shares outstanding	51,366	52,301
Per share amount	$ 0.46	$ 0.58