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Impairments	3 Months Ended
Impairments	Mar. 31, 2017
Impairments
Impairments	6. Impairments Long-Lived Assets During the three months ended March 31, 2016, we recorded impairments of $2.2 million in the Owned and Operated Mines segment, primarily for engineering costs related to the Overland Conveyor project at our Antelope Mine and $2.0 million related to a shovel that we no longer expect to use because of declining production that is part of Other. During the three months ended March 31, 2017, we had no such impairments.