Components of Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 28, 2013
Inventory [Line Items]
Raw materials	$ 40,218	$ 35,116
Work in process	11,266	8,449
Finished goods	15,196	17,091
Inventory, Gross	66,680	60,656
Less portion included in other long term assets	(2,348)	(4,259)
Inventories	64,332	56,397
Inventory, Gross	$ 66,680	$ 60,656

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Gross amount, as of the balance sheet date, of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Inventories not expected to be converted to cash, sold or exchanged within the normal operating cycle.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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