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Note 15 - Share-Based and Other Compensation Plans (Awards Summary - Textual) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares remaining available for grant (shares reserve) 1,004,109    
Equity Compensation Plan, 2014 [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares of common stock authorized for issuance 6,423,163    
Number of shares remaining available for grant (shares reserve) 1,004,109    
Share-based Compensation Arrangement By Share-based Payment Award Number of Shares Available for Grant Excluding Adjustments 4,269,701    
Equity Compensation Plan, 2014 [Member] | Restricted Stock, Restricted Stock Units and Performance Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation, Reduction of Shares Available for Grant by Each Grant of Equity Award 1.31    
Equity Compensation Plans [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum contractual term for all awards 10 years    
Change of control, estimated pre-tax accounting charge, acceleration of compensation expense   $ 11.7 $ 17.5
Equity Compensation Plans [Member] | Grants Awarded From May 13 2009 and Forward [Member] | Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Change of control, grantee employment termination, vesting period range (in days and years) 90 days    
Equity Compensation Plans [Member] | Grants Awarded From May 13 2009 and Forward [Member] | Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Change of control, grantee employment termination, vesting period range (in days and years) 1 year