Note 2 - Goodwill and Other Intangible Assets (Detail) - Goodwill (USD $) In Thousands, unless otherwise specified			9 Months Ended
Sep. 30, 2012	Dec. 31, 2011	Sep. 30, 2012 Acquisition of Peck Road Ford [Member]	Sep. 30, 2012 West Texas Peterbilt Acquisition [Member]
Balance January 1, 2012	$ 180,918	$ 182,612
Adjustment to goodwill			36	(1,730)
Balance September 30, 2012	$ 180,918	$ 182,612

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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+ Details