Note 17 - Stock Repurchase Program (Details Textual) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended	3 Months Ended
	Feb. 01, 2016	Feb. 29, 2016	Jun. 30, 2016
August 2015 Repurchase Program [Member]
Treasury Stock, Shares, Acquired		633,250
Treasury Stock, Value, Acquired, Cost Method		$ 17.0
Treasury Stock Acquired, Average Cost Per Share		$ 26.82
February 2016 Repurchase Program [Member]
Treasury Stock, Shares, Acquired	1,380,578
Treasury Stock, Value, Acquired, Cost Method	$ 37.5
Treasury Stock Acquired, Average Cost 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
Treasury Stock, Value, Acquired, Cost Method			$ 54.4