Note 8 - Income Taxes (Details) - Income tax expense benefit and effective income tax rate (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Income tax expense benefit and effective income tax rate [Abstract]
Income tax expense (in Dollars)	$ 3,573	$ 6,926	$ 5,224	$ 9,215
Effective income tax rate	41.00%	38.60%	46.50%	39.10%