Note 12 - Income Taxes Income Tax Reconciliation (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Income Tax Reconciliation, Income Tax Expense (Benefit), at Federal Statutory Income Tax Rate	$ 29.8	$ 28.4	$ 17.9
Income Tax Reconciliation, State and Local Income Taxes	2.6	2.7	1.6
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount	(4.8)	8.8	0.1
income tax reconciliation, adjustments to DTA and DTL	(3.1)	(8.8)	(5.5)
change in state effective tax rate	(4.2)	0	4.3
income tax reconciliation, permanent tax adjustments	2.0	1.7	1.2
Income Tax Reconciliation, Other Reconciling Items	(1.4)	0.2	0.2
INCOME TAX EXPENSE	$ 20.9	$ 33.0	$ 19.8