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Note 3 - Fair Value Measurements
9 Months Ended
Sep. 30, 2016
Notes to Financial Statements  
Fair Value Disclosures [Text Block]
3.
FAIR VALUE MEASUREMENTS
 
Our financial instruments consist of cash and cash equivalents, receivables, payables and debt instruments. We believe that the carrying values of these instruments on the accompanying consolidated balance sheets approximate their fair values.
 
As of September 30, 2016 and December 31, 2015, we believe the carrying value of our floating-rate debt outstanding under our term loans and revolving credit facilities approximates their fair values because their terms include short-term interest rates and exclude penalties for prepayment. We estimated the fair value of our floating-rate term loan and revolving credit facilities using significant other observable inputs, representative of a Level 2 fair value measurement, including terms and credit spreads for these loans.
 
During the first and third quarters of 2016 and the first, second and third quarters of 2015, we wrote down certain long-lived assets to their fair values. Our estimates of fair value required us to use significant unobservable inputs, representative of Level 3 fair value measurements, including numerous assumptions with respect to future circumstances that might directly impact each of the asset groups’ operations in the future and are therefore uncertain. These assumptions with respect to future circumstances included future oil, coal and natural gas prices, anticipated spending by our customers, the cost of capital, and industry and/or local market conditions. During the third quarter of 2016, our estimates of fair value of certain undeveloped land positions in British Columbia were based on appraisals from third parties.
 
During the third quarter of 2015, we also wrote down our goodwill to its implied fair value (IFV). Our estimate of IFV required us to use significant unobservable inputs, representative of Level 3 fair value measurements, including numerous assumptions with respect to future circumstances, such as industry and/or local market conditions that might directly impact each of the reporting units’ operations in the future, and are therefore uncertain.