Note 2 - Summary of Significant Accounting Policies Net Income per Common Share (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Net Income from Continuing Operations	$ 64.3	$ 48.3	$ 31.3
Income (loss) from discontinued operations, net of tax	0	(21.6)	20.0
Net Income	64.3	26.7	51.3
Interest on Convertible Debt, Net of Tax	0.8	2.0	1.3
Net Income (Loss) Available to Common Stockholders, Diluted	$ 65.1	$ 28.7	$ 52.6
Weighted Average Number of Shares Outstanding, Basic	49.8	49.2	48.5
Incremental Common Shares Attributable to Share-based Payment Arrangements	0.4	0.7	0.2
Stock Issued During Period, Shares, Conversion of Convertible Securities	2.2	4.7	2.7
Weighted Average Number of Shares Outstanding, Diluted	52.4	54.6	51.4
Income from Continuing Operations, Per Common Share - Basic	$ 1.29	$ 0.98	$ 0.65
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share	$ 0.00	$ (0.44)	$ 0.41
Earnings Per Share, Basic	$ 1.29	$ 0.54	$ 1.06
Income from Continuing Operations, Per Common Share - Diluted	$ 1.24	$ 0.92	$ 0.63
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share	$ 0.00	$ (0.40)	$ 0.39
Earnings Per Share, Diluted	$ 1.24	$ 0.52	$ 1.02