Note 3 - Inventories (Details) - Inventories (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Inventory [Line Items]
Inventories, net	$ 941,756	$ 859,019
New Vehicle [Member]
Inventory [Line Items]
Inventories, net	711,090	657,043
Used Vehicle [Member]
Inventory [Line Items]
Inventories, net	192,801	167,814
Parts and Accessories [Member]
Inventory [Line Items]
Inventories, net	$ 37,865	$ 34,162