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Inventories, Net Inventories, Net (Details) - USD ($)
$ in Thousands
Sep. 30, 2020
Mar. 31, 2020
Raw materials $ 101,608 $ 94,321
Work in process 40,617 35,643
Finished goods 172,483 151,381
LIFO reserve (18,752) (16,937)
Reserve for excess and obsolete inventory (17,363) (16,149)
Inventories, net $ 278,593 $ 248,259