Inventories, Net (Details) - USD ($) $ in Thousands	Sep. 28, 2018	Dec. 31, 2017
Inventory Disclosure [Abstract]
Raw materials	$ 147,408	$ 141,827
Work in process	102,447	74,704
Finished goods	278,024	254,479
Inventory, gross	527,879	471,010
Less: customer progress payments	0	(2,308)
Less: allowance for excess, slow-moving and obsolete inventory	(43,637)	(39,075)
Inventories, net	$ 484,242	$ 429,627

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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
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-Section S99
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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
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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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Amount of advances received from customers under long-term contracts which have been offset against inventories accounts at the balance sheet date.

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