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		9 Months Ended
	Sep. 28, 2013	Sep. 29, 2012	Sep. 28, 2013	Sep. 29, 2012
Numerator:
Income from continuing operations	$ 22,887	$ 19,756	$ 61,301	$ 51,156
Income from discontinued operations		586		4,506
Net income	$ 22,887	$ 20,342	$ 61,301	$ 55,662
Denominator:
Weighted average basic shares outstanding	36,362	36,240	36,343	36,089
Effect of stock-based compensation awards	270	382	267	400
Weighted average diluted shares outstanding	36,632	36,622	36,610	36,489
Basic:
Continuing operations	$ 0.63	$ 0.54	$ 1.69	$ 1.41
Discontinued operations		$ 0.02		$ 0.13
Net income	$ 0.63	$ 0.56	$ 1.69	$ 1.54
Diluted:
Continuing operations	$ 0.62	$ 0.54	$ 1.67	$ 1.40
Discontinued operations		$ 0.02		$ 0.13
Net income	$ 0.62	$ 0.56	$ 1.67	$ 1.53