Note 8 - Inventories - Schedule of Inventory (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Mar. 31, 2018
Finished goods	$ 95,022	$ 93,467
Work in process	141,884	133,556
Raw materials	353,921	289,754
Total Inventories, net	$ 590,827	$ 516,777

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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