Note 18 - Stock Repurchase Program (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Aug. 31, 2015	Sep. 30, 2015	Sep. 30, 2015
Note 18 - Stock Repurchase Program (Details) [Line Items]
Treasury Stock, Value, Acquired, Cost Method (in Dollars)			$ 50.7
November 2007 [Member]
Note 18 - Stock Repurchase Program (Details) [Line Items]
Treasury Stock, Shares, Acquired	622,500
Treasury Stock, Value, Acquired, Cost Method (in Dollars)	$ 18.1
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)	$ 29.08
August 2015 [Member]
Note 18 - Stock Repurchase Program (Details) [Line Items]
Treasury Stock, Shares, Acquired		1,100,000
Treasury Stock, Value, Acquired, Cost Method (in Dollars)		$ 32.6
Treasury Stock Acquired, Average Cost Per Share (in Dollars per share)		$ 30.05
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	2,000,000
Stock Repurchase Program, Remaining Number of Shares Authorized to be Repurchased		915,250	915,250