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Note 8 - Leases (Tables)
 12 Months Ended
Dec. 31, 2015
Notes Tables  
Scheduleof Future Minimum Lease Paymentsfor Operatingand Capital Leases [Table Text Block]
 
 
Operating
 
 
Capital
 
2016
   $ 8,430     $ 4,485  
2017
     5,489       1,656  
2018
     2,887       1,656  
2019
     995       1,656  
2020
     66       3,878  
Thereafter
     -       2,896  
Total minimum lease payments
   $ 17,867     $ 16,227  
Less: amount representing interest
             (1,649 )
Present value of minimum lease payments
             14,578  
Less: current portion
             (4,031 )
Capital lease obligations, long-term
           $ 10,547  
Schedule of Rent Expense [Table Text Block]
(in thousands)
  
2015
    
2014
    
2013
  
Revenue equipment rentals
   $ 12,611     $ 20,935     $ 22,991  
Building and lot rentals
     2,078       3,561       4,044  
Other equipment rentals
     340       317       362  
    $ 15,029     $ 24,813     $ 27,397