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INVENTORIES (Tables) | 6 Months Ended
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Sep. 30, 2019
Inventory Disclosure [Abstract] |
Schedule of 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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