Note 3 - Share-based Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2013
Restricted Stock Units (RSUs) [Member]
Note 3 - Share-based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)	$ 34.1	$ 34.1
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		3 years 73 days
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	833,801	865,147
Performance Shares [Member]
Note 3 - Share-based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)	6.8	6.8
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		2 years 255 days
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	61,975	61,975
Employee Stock Option [Member]
Note 3 - Share-based Compensation (Details) [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)	$ 0.2	$ 0.2
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		292 days
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period	111,300	525,788