Note 14 - Subsequent Events (Details) (USD $)	9 Months Ended	0 Months Ended			0 Months Ended		1 Months Ended				0 Months Ended		0 Months Ended		0 Months Ended
	Sep. 30, 2014	Oct. 01, 2014 Common Class A [Member] Subsequent Event [Member] DCH Auto Group (USA) Inc. [Member]	Oct. 01, 2014 Vehicle Floor Plan Debt Financing [Member] Subsequent Event [Member] DCH Auto Group (USA) Inc. [Member]	Oct. 01, 2014 Non-Floor Plan Debt [Member] Subsequent Event [Member] DCH Auto Group (USA) Inc. [Member]	Oct. 01, 2014 Subsequent Event [Member] Scenario, Forecast [Member] Mortgages [Member] DCH Auto Group (USA) Inc. [Member]	Oct. 01, 2014 Subsequent Event [Member] Scenario, Subject to Lender Approval [Member] Syndicated Credit Facility [Member]	Oct. 31, 2014 Subsequent Event [Member] The LLC [Member]	Oct. 01, 2014 Subsequent Event [Member] New Vehicle Floor Plan [Member] Syndicated Credit Facility [Member]	Oct. 01, 2014 Subsequent Event [Member] Used Vehicle Floor Plan [Member] Syndicated Credit Facility [Member]	Oct. 01, 2014 Subsequent Event [Member] Working Capital Financing [Member] Syndicated Credit Facility [Member]	Oct. 01, 2014 Subsequent Event [Member] Syndicated Credit Facility [Member] DCH Auto Group (USA) Inc. [Member]	Oct. 01, 2014 Subsequent Event [Member] Syndicated Credit Facility [Member]	Oct. 01, 2014 Subsequent Event [Member] DCH Auto Group (USA) Inc. [Member]	Oct. 01, 2014 Subsequent Event [Member] DCH Auto Group (USA) Inc. [Member]	Oct. 06, 2014 Subsequent Event [Member] Harris Nissan [Member]	Oct. 27, 2014 Subsequent Event [Member]
Note 14 - Subsequent Events (Details) [Line Items]
Number of Stores														27
Business Combination, Consideration Transferred	$ 84,719,000												$ 669,500,000		$ 7,800,000
Payments to Acquire Businesses, Gross													364,000,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in Shares)		268,770
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable		22,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Financial Liabilities			230,000,000	53,000,000
Debt Instrument Capacity, Increase (Decrease), Net					100,000,000						700,000,000
Line of Credit Facility, Maximum Borrowing Capacity						1,850,000,000		1,250,000,000	150,000,000	300,000,000		1,700,000,000
Number of Financial Institutions												16
Number of Manufacturer-Affiliated Finance Companies												7
Consolidated Ownership, Percentage							99.90%
Contractual Obligation							37,100,000
Contractual Obligation, Term							24 months
Common Stock, Dividends, Per Share, Declared (in Dollars per share)																$ 0.16
Dividends, Common Stock, Cash																$ 4,200,000