Note 17 - Stock Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended
	Feb. 29, 2016	Mar. 31, 2016	Feb. 01, 2016
Note 17 - Stock Repurchase Program (Details) [Line Items]
Treasury Stock, Value, Acquired, Cost Method (in Dollars)		$ 54.4
August 2015 Repurchase Program [Member]
Note 17 - Stock Repurchase Program (Details) [Line Items]
Treasury Stock, Shares, Acquired	633,250
Treasury Stock, Value, Acquired, Cost Method (in Dollars)	$ 17.0
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)	$ 26.82
February 2016 Repurchase Program [Member]
Note 17 - Stock Repurchase Program (Details) [Line Items]
Treasury Stock, Shares, Acquired	1,380,578
Treasury Stock, Value, Acquired, Cost Method (in Dollars)	$ 37.5
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)	$ 27.13
Stock Repurchase Program, Number of Shares Authorized to be Repurchased			45,000,000
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased		7,500,000