Note 8 - Income Taxes (Details) - Income tax expense benefit and effective income tax rate (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Income tax expense benefit and effective income tax rate [Abstract]
Income tax expense (in Dollars)	$ 4,491	$ 10,035	$ 9,715	$ 19,250
Effective income tax rate	38.80%	38.70%	42.60%	38.90%