Note 9 - Dividends and Dividend Equivalents (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	1 Months Ended	3 Months Ended			12 Months Ended
	Dec. 21, 2012	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Dec. 31, 2014	Dec. 31, 2012
Dividends And Dividend Equivalents [Abstract]
Dividends Payable, Current		$ 5.8			$ 5.8
Dividend Equivalents, Current		0.8			0.8
Common Stock, Dividends, Per Share, Declared (in Dollars per share)		$ 0.15	$ 0.15	$ 0.15	$ 0.45	$ 1.00
Dividends, Common Stock, Cash	$ 35.7