INVENTORY AND LONG-TERM PARTS INVENTORY (Narrative) (Details) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2017 |
Mar. 31, 2016 |
Dec. 31, 2016 |
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| Inventory Disclosure [Abstract] | |||
| Inventory valuation reserves | $ 2,500 | $ 3,100 | |
| Lower-of-cost-or-market inventory adjustments | 3,824 | $ 9,007 | |
| Production Related Impairments or Charges | $ 0 | $ 650 | |
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- References No definition available.
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- Definition Amount of valuation reserve for inventory. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Nonrecurring impairment charges related to the write-off of production-related equipment and inventory. This tag is used when an Entity charges this cost to cost of goods sold. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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