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Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
Income Taxes - Additional Information (Detail) (USD $)	Mar. 29, 2014	Mar. 30, 2013
Income Taxes [Line Items]
Income tax expense	$ 1,841,000	$ 1,028,000
Income tax expense increase (decrease)	800,000
Discrete tax benefit recognized		$ 400,000
Effective tax rate	27.00%	18.40%
Reduction in income tax rate related to tax benefit of exercise of employee stock option	0.20%	1.40%
Discrete tax benefit percentage	7.50%

Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to deductions. Including, but not limited to, extraterritorial income exclusion deduction, qualified production activity deduction, dividend deduction, deduction for dividend paid to employee stock ownership plan, Medicare prescription drug benefit subsidy deduction, and other deductions.

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