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Reconciliation of Net Income Per Common Share (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 27, 2013	Sep. 28, 2012	Sep. 27, 2013	Sep. 28, 2012
Numerator:
Net income	$ 4,160	$ 3,816	$ 12,154	$ 10,907
Denominator:
Weighted average basic common shares outstanding	20,928,148	20,662,956	20,819,209	20,571,848
Dilutive effect of unvested common shares	217,011	317,063	233,351	339,489
Weighted average diluted common shares outstanding	21,145,159	20,980,019	21,052,560	20,911,337

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The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest.

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The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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