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Note 5 - Property and Equipment
 12 Months Ended
Dec. 31, 2015
Notes to Financial Statements  
Property, Plant and Equipment Disclosure [Text Block]
5
.            
PROPERTY AND EQUIPMENT
 
A summary of property and equipment, at cost, as of December 31, 2015 and 2014 is as follows:
 
(in thousands)
  
Estimated
Useful Lives (in years)
    
2015
    
2014
  
Revenue equipment
     3 - 10     $ 468,693     $ 418,574  
Communications equipment
     5 - 10       8,189       8,248  
Land and improvements
     0 - 10       25,184       18,820  
Buildings and leasehold improvements
     7 - 40       71,614       37,217  
Construction in-progress
       -         1,104       2,976  
Other
     2 - 7       21,287       19,510  
                $ 596,071     $ 505,345  
 
Depreciation expense was $61.9 million, $49.0 million, and $44.2 million, in 2015, 2014, and 2013, respectively. The aforementioned depreciation expense excludes net gains on the sale of property and equipment totaling $0.6 million, $2.7 million, and $0.8 million in 2015, 2014, and 2013, respectively, which are presented net in depreciation and amortization expense in the consolidated statements of operations.
 
We lease certain revenue equipment under capital leases with terms of approximately 60 to 84 months. At December 31, 2015 and 2014, property and equipment included capitalized leases, which had capitalized costs of $19.4 million and $33.8 million and accumulated amortization of $4.7 million and $10.6 million, respectively. Amortization of these leased assets is included in depreciation and amortization expense in the consolidated statement of operations and totaled $2.0 million, $3.0 million, and $2.2 million during 2015, 2014, and 2013, respectively.