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Note 10 - Leasing Activities (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Note 10 - Leasing Activities (Details) [Line Items]      
Operating Leases, Rent Expense $ 109,222,000 $ 84,174,000 $ 69,620,000
Operating Leases, Future Minimum Payments Due, Future Minimum Sublease Rentals 43,500,000    
Operating Leases, Income Statement, Minimum Lease Revenue 112,000,000 86,300,000 68,300,000
Operating Leases, Income Statement, Contingent Revenue 18,100,000 13,800,000 10,600,000
Property Subject to or Available for Operating Lease, Net 405,200,000 327,400,000  
Property Subject to or Available for Operating Lease, Accumulated Depreciation 142,400,000 115,600,000  
Vehicle Leases As Lessee [Member] | Minimum [Member]
      
Note 10 - Leasing Activities (Details) [Line Items]      
Lease Term 1 year    
Vehicle Leases As Lessee [Member] | Maximum [Member]
      
Note 10 - Leasing Activities (Details) [Line Items]      
Lease Term 10 years    
Vehicle Leases As Lessor [Member] | Minimum [Member]
      
Note 10 - Leasing Activities (Details) [Line Items]      
Lease Term 1 year    
Vehicle Leases As Lessor [Member] | Maximum [Member]
      
Note 10 - Leasing Activities (Details) [Line Items]      
Lease Term 10 years    
Vehicles [Member]
      
Note 10 - Leasing Activities (Details) [Line Items]      
Operating Leases, Rent Expense 2,300,000 2,800,000 2,800,000
Land and Building [Member]
      
Note 10 - Leasing Activities (Details) [Line Items]      
Operating Leases, Rent Expense 9,100,000 6,800,000 5,700,000
Land and Building [Member] | Minimum [Member]
      
Note 10 - Leasing Activities (Details) [Line Items]      
Monthly Rental Payment, Operating Lease 275    
Land and Building [Member] | Maximum [Member]
      
Note 10 - Leasing Activities (Details) [Line Items]      
Monthly Rental Payment, Operating Lease 61,800    
Vehicle Leases As Lessee [Member]
      
Note 10 - Leasing Activities (Details) [Line Items]      
Guaranteed Residual Value under Operating Lease Arrangements 3,500,000    
Guaranteed Residual Value under Capital Lease Arrangements $ 18,000,000