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Note 1 - Summary of Significant Accounting Policies (Details Textual) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($)
Minimum [Member] |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 1.49% |  |
Maximum [Member] |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 3.00% |  |
Number of New Vehicle Brands | 31 |  |
Number of Stores | 137 |  |
Interest Costs Capitalized | $ 0.5 | $ 0.4 | $ 0.1
Number of Financial Institutions | 18 |  |
Number of Manufacturer Affiliated Finance Companies | 8 |  |
Long-term Debt, Percentage Bearing Variable Interest, Amount | $ 1,700.0 |  |
Product Warranty Accrual | $ 0.5 | $ 0.4 |
Number of Reportable Segments | 3 |  |

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- Definition Amount of interest capitalized during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Allowance for Funds Used during Construction -URI http://asc.fasb.org/extlink&oid=6504829 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6450988&loc=d3e26243-108391 + Details
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- Definition Carrying value as of the balance sheet date of obligations incurred through that date and payable for estimated claims under standard and extended warranty protection rights granted to customers. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph ((c)(5)) -URI http://asc.fasb.org/extlink&oid=51674963&loc=d3e12565-110249 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.15(5)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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