Note 6 - Stockholders' Equity and Equity Compensation (Details) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	6 Months Ended	12 Months Ended			3 Months Ended		6 Months Ended				3 Months Ended		6 Months Ended			12 Months Ended	6 Months Ended
	May 31, 2013	Jun. 30, 2013	Dec. 31, 2013	Jun. 30, 2013 Employee Plan [Member]	Jun. 30, 2013 Director Plan [Member]	Jun. 30, 2013 Restricted Stock [Member]	Jun. 30, 2012 Restricted Stock [Member]	Jun. 30, 2013 Restricted Stock [Member]	Jun. 30, 2012 Restricted Stock [Member]	Jun. 30, 2013 Deferred Stock Units [Member]	Jun. 30, 2012 Deferred Stock Units [Member]	Jun. 30, 2013 Employee Stock Option [Member]	Jun. 30, 2012 Employee Stock Option [Member]	Jun. 30, 2013 Employee Stock Option [Member]	Jun. 30, 2012 Employee Stock Option [Member]	Jun. 30, 2013 In Connection with Equity Compensation Programs [Member]	Dec. 31, 2013 In Connection with Equity Compensation Programs [Member]	Jun. 30, 2013 Through the Open Market Repurchase Program [Member]	Jun. 30, 2013 Minimum [Member]	Jun. 30, 2013 Maximum [Member]
Note 6 - Stockholders' Equity and Equity Compensation (Details) [Line Items]
Stock Repurchase Program, Authorized Amount	$ 10.0		$ 5.0														$ 5.0
Stock Repurchased During Period, Shares (in Shares)																50,578,000,000		645,732
Stock Repurchased During Period, Value																1.2		14.7
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)		$ 23.32														$ 22.69
Number of Equity-Based Compensation Plans		2
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares)				2,895,000	250,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares)				2,895,000	168,390
Allocated Share-based Compensation Expense						0.9	1.2	2.1	2.2	0.9	0.7	0.4	0.5	1.0	1.1
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized						$ 14.5		$ 14.5				$ 1.8		$ 1.8
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition								2 years 6 months						1 year 219 days
Deferred Stock Unit, Share Transfer Obligation (in Shares)		1
Stock Options, General Term																			7 years	10 years
Price Per Share For Intrinsic Value Calculation Stock Options (in Dollars per share)												$ 22.51	$ 17.89	$ 22.51	$ 17.89