Note 2 - Accounts Receivable (Detail) - Accounts Receivable (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Receivables, gross	$ 138,671	$ 138,438
Less: Allowance	(141)	(336)
Less: Long-term portion of trade receivables	(4,421)	(4,953)
Total accounts receivable, net	134,109	133,149
Contracts in Transit [Member]
Receivables, gross	68,066	65,597
Trade Accounts Receivable [Member]
Receivables, gross	27,682	25,885
Vehicle Receivables [Member]
Receivables, gross	18,525	21,298
Manufacturer Receivables [Member]
Receivables, gross	$ 24,398	$ 25,658