Inventories - Major Classes of Inventories (Detail) - USD ($) $ in Thousands	Apr. 02, 2017	Dec. 31, 2016
Inventory Disclosure [Abstract]
Raw materials	$ 104,064	$ 90,019
Work-in-process	30,220	25,166
Finished goods	108,253	99,784
Gross inventories	242,537	214,969
Excess and obsolete reserves	(24,133)	(24,561)
Net inventories	$ 218,404	$ 190,408

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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 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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
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-Subparagraph (SX 210.5-02.6(a))
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-Name Accounting Standards Codification
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-Section 35
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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 330
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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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