Inventories (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 28, 2014	Dec. 31, 2013
Inventory [Line Items]
Raw materials	$ 23,679	$ 23,692
Finished goods	9,791	7,176
Sales demonstration inventory	21,496	19,545
Reserve for excess and obsolete	(1,664)	(1,473)
Inventories	53,302	48,940
Service inventory	$ 21,906	$ 19,033

Inventory used for the repair of warranted and non-warranted equipment previously sold to customers.

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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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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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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 of valuation reserve for inventory.

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Gross amount of merchandise, goods, commodities, or supplies to which the entity holds the title and uses for the specific purpose of showing the benefits and features of the entity's products to existing or potential customers.

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