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Inventories (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Mar. 31, 2020
--- | --- | ---
Inventory [Line Items] |  |
Raw materials | $ 81,220 | $ 85,452
Work-in-process | 22,615 | 25,876
Finished goods | 27,790 | 33,216
At cost - FIFO basis: | 131,625 | 144,544
LIFO cost less than FIFO cost | (18,179) | (17,171)
Net inventories | $ 113,446 | $ 127,373

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- Definition Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)(1)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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- Definition 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. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)(3)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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