Note 11 - Derivative Financial Instruments (Details) - Effect of Derivative Instruments on Consolidated Statements of Operations (Floor Plan Interest Expense [Member], USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Floor Plan Interest Expense [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Interest Rate Swap Contract, Amount of Gain Recognized in Accumulated OCI (Effective Portion)	$ 505	$ 1,005	$ 1,655
Interest Rate Swap Contract, Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)	(488)	(740)	(1,413)
Interest Rate Swap Contract, Amount of Loss Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)	$ (732)	$ (1,235)	$ (2,900)

Note 11 - Derivative Financial Instruments (Details) - Effect of Derivative Instruments on Consolidated Statements of Operations (Floor Plan Interest Expense [Member], USD $)
In Thousands, unless otherwise specified

12 Months Ended

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2012

Floor Plan Interest Expense [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Interest Rate Swap Contract, Amount of Gain Recognized in Accumulated OCI (Effective Portion)

$ 505

$ 1,005

$ 1,655

Interest Rate Swap Contract, Amount of Loss Reclassified from Accumulated OCI into Income (Effective Portion)

(488)

(740)

(1,413)

Interest Rate Swap Contract, Amount of Loss Recognized in Income on Derivative (Ineffective Portion and Amount Excluded from Effectiveness Testing)

$ (732)

$ (1,235)

$ (2,900)