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Inventories (Details) - USD ($) $ in Thousands	Jun. 26, 2015	Dec. 26, 2014
Inventories Details [Abstract]
Finished products and components	$ 108,684	$ 87,384
Products and components in various stages of completion	49,864	47,682
Raw materials and purchased components	82,105	69,212
Inventory, Gross, Total	240,653	204,278
Reduction to LIFO cost	(46,085)	(44,481)
Total	$ 194,568	$ 159,797

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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 of difference between inventory at lower of LIFO cost or market and inventory at lower of other inventory accounting method cost or market, for example, but not limited to, FIFO or average cost.

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Gross amount of unprocessed materials to be used in manufacturing or production process and supplies that will be consumed.

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