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Note 4 - Debt - Long-term Debt (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Dec. 31, 2016
Long-term Debt, Gross  
Less: liabilities subject to compromise  
Long-term debt and capital lease obligations  
DIP Facility  
DIP Lenders [Member]    
DIP Facility  
Predecessor [Member]    
Long-term Debt, Gross   $ 1,333,800
Less: liabilities subject to compromise   (1,333,800)
Long-term debt and capital lease obligations  
DIP Facility   25,000
Predecessor [Member] | DIP Lenders [Member]    
DIP Facility   25,000
Line of Credit [Member]    
Long-term Debt, Gross  
Line of Credit [Member] | Predecessor [Member]    
Long-term Debt, Gross   284,400
Less: liabilities subject to compromise   (284,400)
Five-Year Term Loans [Member]    
Long-term Debt, Gross  
Five-Year Term Loans [Member] | Predecessor [Member]    
Long-term Debt, Gross   569,250
Less: liabilities subject to compromise   (569,250)
Seven-Year Term Loans [Member]    
Long-term Debt, Gross  
Seven-Year Term Loans [Member] | Predecessor [Member]    
Long-term Debt, Gross   480,150
Less: liabilities subject to compromise   $ (480,150)