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Note 6 - Impairment Charges
3 Months Ended
Mar. 31, 2018
Notes to Financial Statements  
Asset Impairment Charges [Text Block]
6.
IMPAIRMENT CHARGES
 
Quarter ended
March 31, 2018.
  During the
first
quarter of
2018,
we identified an indicator that certain assets used in the Canadian oil sands
may
be impaired due to market developments, including expected customer commitments, occurring in the
first
quarter of
2018.
 For purposes of our impairment assessment, we separated
two
lodges that were previously treated as a single asset group due to the lodges
no
longer being used together to generate joint cash flows.  We assessed the carrying value of the asset group to determine if it continued to be recoverable based on estimated future cash flows.  Based on the assessment, the carrying value was determined to
not
be fully recoverable, and we proceeded to compare the estimated fair value of the asset group to its respective carrying value.  Accordingly, the value of a Canadian lodge was written down to its estimated fair value of
zero
.  As a result of the analysis described above, we recorded an impairment expense of
$28.7
million.