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Note 15 - Acquisitions (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Prairie International Trucks [Member]
Dec. 31, 2013
TransAuthority, Inc. [Member]
Dec. 31, 2013
Midwest Truck Sales [Member]
Dec. 31, 2013
Larson Group [Member]
Dec. 31, 2013
Piedmont International Trucks, LLC [Member]
Dec. 31, 2012
Acquisition of MVI Group [Member]
Dec. 31, 2011
West Texas Peterbilt Acquisition [Member]
Dec. 31, 2011
Acquisition of Peck Road Ford [Member]
Dec. 31, 2011
Asbury Automotive Atlanta Acquisition [Member]
Dec. 31, 2011
Heintzelman’s Truck Center Acquisition [Member]
Note 15 - Acquisitions (Details) [Line Items]                    
Business Combination, Consideration Transferred $ 9.5 $ 41.7 $ 16.8 $ 1.2 $ 3.5 $ 104.5 $ 24.6 $ 10.0 $ 55.3 $ 4.7
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life 15 years 15 years 15 years     15 years        
Business Combination, Value of Real Estate Transferred   $ 11.1 $ 2.3