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INVENTORIES | 6 Months Ended
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Sep. 30, 2019
Inventory Disclosure [Abstract] |
INVENTORIES | (G) INVENTORIES Inventories are stated at the lower of average cost (including applicable material, labor, depreciation, and plant overhead) or net realizable value, and consist of the following:
|  | September 30, |  |  | March 31, |
|  | 2019 |  |  | 2019 |
|  | (dollars in thousands) |
Raw Materials and Materials-in-Progress |  | $ | 101,904 |  |  | $ | 125,828 |
Finished Cement |  |  | 22,062 |  |  |  | 27,826 |
Aggregates |  |  | 7,228 |  |  |  | 7,351 |
Gypsum Wallboard |  |  | 5,587 |  |  |  | 7,124 |
Paperboard |  |  | 11,364 |  |  |  | 15,660 |
Frac Sand |  |  | 2,913 |  |  |  | 2,557 |
Repair Parts and Supplies |  |  | 80,712 |  |  |  | 80,676 |
Fuel and Coal |  |  | 9,829 |  |  |  | 8,172 |
|  | $ | 241,599 |  |  | $ | 275,194 |
During the six months ended September 30, 2019, we wrote down approximately $2.0 million of raw materials and materials in process and $0.1 million of frac sand. These inventories related to our Oil and Gas Proppants segment.

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- Definition The entire disclosure for inventory. Includes, but is not limited to, the basis of stating inventory, the method of determining inventory cost, the classes of inventory, and the nature of the cost elements included in inventory. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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