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Note 11 - Long-Term Debt Schedule of Long Term Debt (Details) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2016
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Jun. 29, 2016
Dec. 31, 2015
Debt Instrument [Line Items]              
Long-term debt   $ 1,278,051   $ 1,278,051     $ 1,219,454
Loss on induced conversion and debt extinguishment   $ (2,108) $ (91,876) $ (57,678) $ (91,876)    
Senior Notes Due 2017              
Debt Instrument [Line Items]              
Debt Instrument Repurchased, Authorized Amount           $ 195,500  
Debt Instrument, Interest Rate, Stated Percentage   9.00%   9.00%      
Long-term debt   $ 193,318   $ 193,318     192,261
Debt Instrument, Redemption Price, Percentage       100.00%      
Debt Instrument, Basis Spread on Variable Rate       0.50%      
Convertible Senior Notes Due 2017              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage   3.00%   3.00%      
Long-term debt   $ 20,261   $ 20,261     46,115
Convertible Debt, Termination of Capped Call Transaction, Total Consideration $ 2,600            
Convertible Debt, Termination of Capped Call Transaction, Closing Stock Price $ 11.86            
Convertible Senior Notes Due 2019              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage   2.25%   2.25%      
Long-term debt   $ 79,649   $ 79,649     341,214
Senior Notes Due 2019              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage   5.50%   5.50%      
Long-term debt   $ 296,320   $ 296,320     295,751
Senior Notes Due 2020              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage   5.25%   5.25%      
Long-term debt   $ 344,702   $ 344,702     344,113
Senior Notes Due 2021              
Debt Instrument [Line Items]              
Debt Instrument, Interest Rate, Stated Percentage   7.00%   7.00%      
Long-term debt   $ 343,801   $ 343,801     0
Long-term debt, Gross $ 350,000 $ 350,000   $ 350,000      
Proceeds from Issuance of Long-term Debt $ 343,500            
Debt Instrument, Redemption Price, Percentage       100.00%      
Debt Instrument, Basis Spread on Variable Rate       0.50%      
Percent of Stock With Ordinary Voting Rights That Company Must Retain In Order To Make Any Capital Stock Transactions Under Debt Covenant Agreement   80.00%   80.00%      
Convertible Debt              
Debt Instrument [Line Items]              
Payments of Debt Extinguishment Costs       $ 206,900      
Debt Conversion, Converted Instrument, Shares Issued       17.0      
Loss on induced conversion and debt extinguishment       $ (57,700)      
Loss on induced conversion and debt extinguishment (Note 10)       41,000      
Losses on Extinguishment of Debt       (15,600)      
Write off of Deferred Debt Issuance Cost       1,100      
Convertible Debt, Termination of Capped Call Transaction, Number of Shares Received 0.2            
Convertible Debt | Convertible Senior Notes Due 2017              
Debt Instrument [Line Items]              
Long-term debt   $ 20,261   20,261     46,115
Long-term debt, Gross   22,233   22,233     52,370
Debt Instrument, Repurchase Amount   30,100   30,100      
Convertible Debt | Convertible Senior Notes Due 2019              
Debt Instrument [Line Items]              
Long-term debt   79,649   79,649     341,214
Long-term debt, Gross   89,194   89,194     $ 389,992
Debt Instrument, Repurchase Amount   $ 300,800   $ 300,800