Note 2 - Accounts Receivable (Details) - Accounts Receivable (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	$ 200,672	$ 180,754
Less: Allowance	(966)	(546)
Less: Long-term portion of accounts receivable, net	(17,851)	(9,689)
Total accounts receivable, net	181,855	170,519
Contracts in Transit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	91,920	85,272
Trade Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	24,873	23,154
Vehicle Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	25,093	23,606
Manufacturer Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	34,282	31,662
Auto Loan Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	21,807	11,438
Other Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	$ 2,697	$ 5,622