INVENTORIES (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Inventory Disclosure [Abstract]
Inventory, Raw Materials, Net of Reserves	$ 177,828	$ 153,876
Inventory, Work in Process, Net of Reserves	80,729	100,359
Inventory, Finished Goods, Net of Reserves	120,767	108,329
Inventory For Long-term Contracts Or Programs, Net Of Reserves	56,599	70,414
Inventories, Net of Reserves	435,923	432,978
Progress Payments Netted Against Inventory for Long-term Contracts or Programs	(7,044)	(8,143)
Inventories, net	$ 428,879	$ 424,835

Inventories, Net of Reserves

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Inventory For Long-term Contracts Or Programs, Net Of Reserves

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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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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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of unprocessed items to be consumed in the manufacturing or production process.

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Carrying amount, net of reserves and adjustments, as of the balance sheet date of merchandise or goods which are partially completed. This inventory is generally comprised of raw materials, labor and factory overhead costs, which require further materials, labor and overhead to be converted into finished goods, and which generally require the use of estimates to determine percentage complete and pricing.

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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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