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Note 10 - Leasing Activities (Tables)
12 Months Ended
Dec. 31, 2012
Schedule of Future Minimum Lease Payments for Capital Leases and Operating Leases [Table Text Block]
   
Capital
Leases
   
Operating
Leases
 
2013
  $ 12,177     $ 1,755  
2014
    11,274       730  
2015
    9,552       284  
2016
    7,233       70  
2017
    5,001       27  
Thereafter
    9,372        
                 
Total minimum lease payments
  $ 54,609     $ 2,866  
Less amount representing interest
    (4,636 )        
Present value of net minimum capital lease payments
    49,973          
Less current portion
    (10,673 )        
Obligations under capital leases less current portion
  $ 39,300          
Schedule of Future Minimum Rental Receivable for Operating Leases [Table Text Block]
2013
  $ 69,551  
2014
    59,688  
2015
    50,823  
2016
    37,212  
2017
    23,848  
Thereafter
    16,232  
         
Total
  $ 257,354  
Operating Leases of Lessee Disclosure [Table Text Block]
2013
  $ 7,133  
2014
    5,254  
2015
    4,368  
2016
    3,527  
2017
    2,241  
Thereafter
    7,049  
         
Total
  $ 29,572