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Note 7 - Floor Plan Notes Payable and Lines Of Credit (Details) (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
If Terminated On or Prior to January 11, 2015 [Member]
GE Capital Credit Agreement [Member]
Dec. 31, 2013
If Terminated after January 11, 2015 and On or Prior to July 11, 2015 [Member]
GE Capital Credit Agreement [Member]
Dec. 31, 2013
If Terminated After July 11, 2015[Member]
GE Capital Credit Agreement [Member]
Dec. 31, 2013
London Interbank Offered Rate (LIBOR) [Member]
GE Capital Credit Agreement [Member]
Dec. 31, 2013
Prime Rate [Member]
Ford Motor Financing Agreement [Member]
Dec. 31, 2013
GE Capital Credit Agreement [Member]
Dec. 31, 2013
Ford Motor Financing Agreement [Member]
Dec. 31, 2013
Line of Credit [Member]
Note 7 - Floor Plan Notes Payable and Lines Of Credit (Details) [Line Items]                    
Line of Credit Facility, Maximum Borrowing Capacity               $ 750,000,000   $ 15,000,000
Debt Instrument, Basis Spread on Variable Rate           2.03% 1.50%      
Debt Instrument, Interest Rate at Period End               2.27% 5.25%  
Debt Instrument, Working Capital Fee, Percentage               0.35%    
Debt Instrument, Prepayment Processing Fee, Amount     15,000,000 7,500,000 300,000          
593,649,000 534,520,000           546,100,000 47,500,000  
Debt Instrument, Basis Spread on Variable Rate (in Basis Points)           2.03% 1.50%      
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum             3.75%      
Debt, Weighted Average Interest Rate 1.26% 1.42%                
Line of Credit, Amount Pledged to Secure Letters of Credit                   8,000,000
Line of Credit Facility, Remaining Borrowing Capacity                   $ 7,000,000