Inventories, Net (Details) - USD ($) $ in Thousands |
Mar. 31, 2020 |
Mar. 31, 2019 |
Mar. 31, 2018 |
Mar. 31, 2017 |
|---|---|---|---|---|
| Notes To Financial Statements [Abstract] | ||||
| Inventory, Raw Materials | $ 94,321 | $ 83,009 | ||
| Inventory, Work in Process | 35,643 | 30,694 | ||
| Inventory, Finished Goods | 151,381 | 131,051 | ||
| Inventory, LIFO Reserve | (16,937) | (16,757) | ||
| Inventory Valuation Reserves | (16,149) | (19,754) | $ (19,639) | $ (17,854) |
| Inventories, net | $ 248,259 | $ 208,243 |