Earnings Per Share - Schedule of Computation of Basic Earnings Per Share and Diluted 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
Numerator
Net income	$ 23,244	$ 19,342	$ 46,795	$ 38,414
Denominator:
Weighted average basic shares outstanding	36,315	36,347	36,344	36,331
Effect of stock-based compensation awards	156	338	170	327
Weighted average diluted shares outstanding	36,471	36,685	36,514	36,658
Earnings Per Share:
Basic	$ 0.64	$ 0.53	$ 1.29	$ 1.06
Diluted	$ 0.64	$ 0.53	$ 1.28	$ 1.05