Note 8 - Income Taxes (Details Textual) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Noncurrent Liabilities [Member]
Unrecognized Tax Benefits	$ 34.7		$ 34.7
Effective Income Tax Rate Reconciliation, Percent	38.00%	38.10%	38.00%	38.10%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 22.6		$ 22.6
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	$ 4.9		$ 4.9