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INVENTORIES | 6 Months Ended
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Sep. 30, 2016
Inventory Disclosure [Abstract] |
INVENTORIES | (F) INVENTORIES Inventories are stated at the lower of average cost (including applicable material, labor, depreciation, and plant overhead) or market, and consist of the following:
|  | As of |
|  | September 30, 2016 |  |  | March 31, 2016 |
|  | (dollars in thousands) |
Raw Materials and Material-in-Progress |  | $ | 104,759 |  |  | $ | 119,060 |
Finished Cement |  |  | 17,096 |  |  |  | 21,834 |
Gypsum Wallboard |  |  | 5,939 |  |  |  | 5,839 |
Frac Sand |  |  | 3,375 |  |  |  | 5,501 |
Aggregates |  |  | 8,387 |  |  |  | 10,660 |
Paperboard |  |  | 3,647 |  |  |  | 7,575 |
Repair Parts and Supplies |  |  | 68,777 |  |  |  | 68,155 |
Fuel and Coal |  |  | 5,602 |  |  |  | 4,971 |
|  | $ | 217,582 |  |  | $ | 243,595 |
During the three months ended September 30, 2016 we wrote down approximately $7.7 million and $0.8 million of raw materials and materials-in-process and frac sand, respectively. During the three months ended September 30, 2015 we wrote down approximately $9.4 million of raw materials and materials-in-process. 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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6361739&loc=d3e7789-107766 + Details
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