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Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended			6 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Jun. 28, 2013	Mar. 29, 2013	Jun. 29, 2012	Jun. 28, 2013	Jun. 29, 2012
Income Tax Disclosure [Abstract]
Tax expense	$ 3,668,000		$ 3,696,000	$ 5,577,000	$ 6,764,000
Rate against income before income taxes	29.20%		31.80%	26.20%	32.50%
Discrete income tax charge		$ 600,000			$ (100,000)

- Definition

A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

The sum of the current income tax expense or benefit and the deferred income tax expense or benefit pertaining to continuing operations.

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