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INVENTORY AND LONG-TERM PARTS INVENTORY | 12 Months Ended
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Dec. 31, 2018
Inventory Disclosure [Abstract] |
INVENTORY AND LONG-TERM PARTS INVENTORY | INVENTORY AND LONG-TERM PARTS INVENTORY The following summarizes our inventory, recorded at the lower of weighted average cost or estimated net realizable value as of December 31, 2018, and 2017, respectively (in thousands):
|  | December 31,
|  | 2018 |  | 2017
Finished goods product inventory |  | $ | 48,370 |  |  | $ | 54,577 |
In-process mineral inventory |  | 24,325 |  |  | 19,822 |
Total product inventory |  | 72,695 |  |  | 74,399 |
Current parts inventory, net |  | 9,351 |  |  | 8,727 |
Total current inventory, net |  | 82,046 |  |  | 83,126 |
Long-term parts inventory, net |  | 30,031 |  |  | 30,611 |
Total inventory, net |  | $ | 112,077 |  |  | $ | 113,737 |
Parts inventories are shown net of any required allowances. During the years ended December 31, 2018, 2017, and 2016, we recorded charges of approximately $1.7 million, $6.4 million, and $20.4 million, respectively, as a result of routine assessments of the lower of weighted average cost or estimated NRV on our finished goods product inventory. During the conversion of the East plant to a Trio®-only facility in 2016, we suspended potash production at our East facility for a total of seven days. As a result, approximately $1.7 million of production costs at our East facility that would have been allocated to additional tons produced, were excluded from our inventory values and instead expensed as period production costs in the year ended December 31, 2016.

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -URI http://asc.fasb.org/topic&trid=2126998 + Details
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