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Note 3 - Inventories (Details) - Inventories (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Inventory [Line Items]    
Inventories, net $ 783,840 $ 723,326
New Vehicle [Member]
   
Inventory [Line Items]    
Inventories, net 597,740 563,275
Used Vehicle [Member]
   
Inventory [Line Items]    
Inventories, net 153,944 130,529
Parts and Accessories [Member]
   
Inventory [Line Items]    
Inventories, net $ 32,156 $ 29,522