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Note 20 - Stock-based Compensation (Details Textual) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Stock Based Compensation [Line Items]      
Intrinsic value of options, outstanding $ 0    
Intrinsic value of options, exercisable 0    
Intrinsic value of options, expected to vest $ 0    
Options exercised 0    
Shares Under Option, Granted 2,605,051    
Stock Options [Member]      
Stock Based Compensation [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period 7 years    
Allocated Share-based Compensation Expense $ 5,000,000 $ 4,000,000 $ 4,000,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 6,000,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 8 months 12 days    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value (in Dollars per share) $ 2.26 $ 5.56 $ 5.94
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value $ 4,000,000 $ 3,000,000 $ 2,000,000
Restricted Stock Units (RSUs) [Member]      
Stock Based Compensation [Line Items]      
Weighted average grant date fair value $ 9.20 $ 13.85 $ 14.86
Fair value of restricted stock units vested $ 7,000,000 $ 7,000,000 $ 5,000,000
Omnibus Incentive Plan 2013 [Member]      
Stock Based Compensation [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period 3 years    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in Shares) 4,800,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Cash Payment Per Employee $ 2,500,000    
Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Fair Value of Awards Per Non-Employee Director $ 900,000    
Omnibus Incentive Plan 2013 [Member] | Stock Options [Member] | Maximum [Member]      
Stock Based Compensation [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant (in Shares) 2,000,000    
Omnibus Incentive Plan 2013 [Member] | Stock Options and Stock Appreciation Rights [Member]      
Stock Based Compensation [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee (in Shares) 2,000,000    
Omnibus Incentive Plan 2013 [Member] | Performance Shares [Member]      
Stock Based Compensation [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Maximum Number of Shares Per Employee (in Shares) 1,000,000    
Omnibus Incentive Plan 2013 [Member] | Unvested Restricted Stock Awards [Member]      
Stock Based Compensation [Line Items]      
Allocated Share-based Compensation Expense $ 4,000,000 $ 5,000,000 7,000,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized $ 2,000,000    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 6 months    
2015 Incentive Compensation Plan [Member]      
Stock Based Compensation [Line Items]      
Allocated Share-based Compensation Expense     $ 5,000,000
Shares Under Option, Granted   188,584  
Issuance of pretax fair value   $ 2,000,000