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Prepaid Tires, Property, Equipment and Depreciation
6 Months Ended
Jun. 30, 2015
Property, Plant and Depreciation [Abstract]  
Property, Equipment, and Depreciation
Prepaid Tires, Property, Equipment, and Depreciation

Property and equipment are reported at cost, net of accumulated depreciation. Maintenance and repairs are charged to operations as incurred.  Tires are capitalized separately from revenue equipment and are reported separately as “Prepaid tires” in the consolidated balance sheets and amortized over two years.  Depreciation expense of $0.3 million and $0.3 million for the three months ended June 30, 2015 and 2014 and $0.5 million and $0.5 million for the six months ended June 30, 2015 and 2014, respectively, have been included in communication and utilities in the consolidated statements of comprehensive income. Depreciation for financial statement purposes is computed by the straight-line method for all assets other than tractors.  We recognize depreciation expense on tractors using the 125% declining balance method. New tractors are depreciated to salvage values of $15,000 while new trailers are depreciated to salvage values of $4,000.