INVENTORIES (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Inventories, by component
Raw materials	$ 106,787	$ 111,653
Work in process	120,151	123,750
Finished goods	144,921	140,392
Total	$ 371,859	$ 375,795

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 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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