Note 2 - Accounts Receivable (Details) - Accounts Receivable (USD $) In Thousands, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	$ 196,328	$ 180,754
Less: Allowance	(588)	(546)
Less: Long-term portion of accounts receivable, net	(12,963)	(9,689)
Total accounts receivable, net	182,777	170,519
Contracts in Transit [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	100,110	85,272
Trade Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	21,478	23,154
Vehicle Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	24,556	23,606
Manufacturer Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	30,834	31,662
Auto Loan Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	13,746	11,438
Other Receivables [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts Receivable	$ 5,604	$ 5,622