Note 18 - Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	12 Months Ended
	Feb. 29, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Jul. 31, 2013
Note 18 - Subsequent Events (Details) [Line Items]
Stock Repurchase Program, Authorized Amount (in Dollars)					$ 100.0
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)		1,562,000	1,426,000	2,974,000
Subsequent Event [Member]
Note 18 - Subsequent Events (Details) [Line Items]
Stock Repurchase Program, Authorized Amount (in Dollars)	$ 50.0
Executive and Non-executive PSUs [Member] | Subsequent Event [Member]
Note 18 - Subsequent Events (Details) [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in Shares)	349,000
Share-based Compensation Arrangement by Share-based Payment Award, Price of Share, Vesting (in Dollars per share)	$ 20
Range 01 [Member] | Executive and Non-executive PSUs [Member] | Subsequent Event [Member]
Note 18 - Subsequent Events (Details) [Line Items]
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed	200.00%
Range 02 [Member] | Executive and Non-executive PSUs [Member] | Subsequent Event [Member]
Note 18 - Subsequent Events (Details) [Line Items]
Share Based Compensation Share Based Payment Other Than Options Percentage Allowed	300.00%