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Note 8 - Leases (Tables)
 12 Months Ended
Dec. 31, 2016
Notes Tables  
Scheduleof Future Minimum Lease Paymentsfor Operatingand Capital Leases [Table Text Block]
 
 
Operating
 
 
Capital
 
2017
   $
7,135
     $
3,062
  
2018
    
6,047
      
3,062
  
2019
    
3,844
      
3,062
  
2020
    
430
      
5,284
  
2021
    
-
      
6,508
  
Thereafter
    
-
      
3,548
  
Total minimum lease payments
   $
17,456
     $
24,526
  
Less: amount representing interest
    
 
      
(2,324
 )
Present value of minimum lease payments
    
 
      
22,202
  
Less: current portion
    
 
      
(2,441
 )
Capital lease obligations, long-term
    
 
     $
19,761
  
Schedule of Rent Expense [Table Text Block]
(in thousands)
  
2016
    
2015
    
2014
  
Revenue equipment rentals
   $
10,773
     $
12,611
     $
20,935
  
Building and lot rentals
    
708
      
2,078
      
3,561
  
Other equipment rentals
    
254
      
340
      
317
  
    $
11,735
     $
15,029
     $
24,813