Annual report pursuant to Section 13 and 15(d)

Note 2 - Long-term Debt (Details Textual)

v3.19.3.a.u2
Note 2 - Long-term Debt (Details Textual)
$ / shares in Units, $ in Thousands, shares in Millions
3 Months Ended 12 Months Ended 25 Months Ended
Oct. 18, 2018
USD ($)
$ / shares
Sep. 07, 2016
USD ($)
shares
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Jun. 30, 2017
USD ($)
Dec. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
$ / shares
Dec. 31, 2016
USD ($)
Oct. 18, 2018
USD ($)
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months     $ 0     $ 0        
Long-term Debt, Maturities, Repayments of Principal in Year Two     0     0        
Long-term Debt, Maturities, Repayments of Principal in Year Three     105,000     105,000        
Long-term Debt, Maturities, Repayments of Principal in Year Four     625,000     625,000        
Proceeds from Issuance of Senior Long-term Debt           $ 625,000    
Gain (Loss) on Extinguishment of Debt, Total       $ 47,100   47,109 7,811    
Refinancing Transaction [Member]                    
Gain (Loss) on Extinguishment of Debt, Total $ 47,100           47,100      
Basic Earnings Per Share Adjustment, Pro Forma | $ / shares $ 0.33                  
Debt Exchange Transaction [Member]                    
Debt Conversion, Converted Instrument, Shares Issued | shares   60.4                
Interest Expense, Debt, Total                   $ 0
Senior Second Lien Notes Due November 2023 [Member]                    
Debt Instrument, Face Amount $ 625,000   $ 625,000 625,000   625,000 625,000     $ 625,000
Debt Instrument, Interest Rate, Stated Percentage 9.75%                 9.75%
Debt Instrument, Interest Rate, Effective Percentage 10.30%                 10.30%
Debt Instrument, Covenant, Repurchase Percent 101.00%                  
Senior Second Lien Notes Due November 2023 [Member] | The Krohn Entity [Member]                    
Proceeds from Issuance of Senior Long-term Debt $ 8,000                  
Senior Second Lien Notes Due November 2023 [Member] | Debt Instrument, Redemption, Period One [Member]                    
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed 100.00%                  
Senior Second Lien Notes Due November 2023 [Member] | Debt Instrument, Redemption, Period Two [Member]                    
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed 104.875%                  
Debt Instrument, Redemption Price, Percentage 35.00%                  
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed Upon Proceeds from Equity Offering 109.75%                  
Senior Second Lien Notes Due November 2023 [Member] | Debt Instrument, Redemption, Period Three [Member]                    
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed 102.438%                  
Senior Second Lien Notes Due November 2023 [Member] | Debt Instrument, Redemption, Period Four [Member]                    
Debt Instrument, Redemption Price, Percentage of Principal Amount Redeemed 100.00%                  
Unsecured Senior Notes [Member] | Refinancing Transaction [Member]                    
Debt Instrument, Interest Rate, Stated Percentage 8.50%                 8.50%
Extinguishment of Debt, Amount $ 189,800                  
Unsecured Senior Notes [Member] | Debt Exchange Transaction [Member]                    
Debt Conversion, Original Debt, Amount   $ 710,200                
Debt Conversion, Original Debt, Percent of Outstanding Debt   79.00%                
Unsecured Senior Notes [Member] | The Krohn Entity [Member]                    
Repayments of Unsecured Debt 5,000                  
Credit Agreement [Member]                    
Line of Credit Facility, Maximum Borrowing Capacity $ 250,000                 $ 250,000
Credit Agreement, Maximum Leverage Ratio     3              
Credit Agreement, Maximum Leverage Ratio Following Material Acquisition 3.5                 3.5
Credit Agreement, Minimum Current Ratio 1                  
Commitment Fee if Borrowing Base Utilization Percentage is Below 50% 0.375%                 0.375%
Commitment Fee is the Borrowing Base Utilization Percentage is 50% or Greater 0.50%                 0.50%
Debt Instrument, Covenant, Minimum Percentage of Derivative Contracts 50.00%                  
Letters of Credit Outstanding, Amount     $ 5,800 $ 9,600   $ 5,800 $ 9,600      
Line of Credit Facility, Interest Rate During Period           4.90%        
Credit Agreement [Member] | Minimum [Member] | Eurodollar [Member]                    
Debt Instrument, Basis Spread on Variable Rate 2.50%                  
Credit Agreement [Member] | Minimum [Member] | Base Rate [Member]                    
Debt Instrument, Basis Spread on Variable Rate 1.50%                  
Credit Agreement [Member] | Maximum [Member] | Eurodollar [Member]                    
Debt Instrument, Basis Spread on Variable Rate 3.50%                  
Credit Agreement [Member] | Maximum [Member] | Base Rate [Member]                    
Debt Instrument, Basis Spread on Variable Rate 2.50%                  
Credit Agreement [Member] | Letter of Credit [Member]                    
Line of Credit Facility, Maximum Borrowing Capacity $ 30,000                 $ 30,000
11.00% 1.5 Lien Term Loan Due November 2019 [Member]                    
Debt Instrument, Face Amount   $ 75,000                
Interest Expense, Debt, Total                 $ 0  
11.00% 1.5 Lien Term Loan Due November 2019 [Member] | Refinancing Transaction [Member]                    
Extinguishment of Debt, Amount $ 75,000                  
11.00% 1.5 Lien Term Loan Due November 2019 [Member] | Refinancing Transaction [Member]                    
Debt Instrument, Interest Rate, Stated Percentage 11.00%                 11.00%
The Nine Percent Term Loan, due May 15, 2020 [Member] | Refinancing Transaction [Member]                    
Debt Instrument, Interest Rate, Stated Percentage 9.00%                 9.00%
Extinguishment of Debt, Amount $ 300,000                  
Second Lien PIK Toggle Notes [Member] | Refinancing Transaction [Member]                    
Extinguishment of Debt, Amount $ 177,500                  
Second Lien PIK Toggle Notes [Member] | Debt Exchange Transaction [Member]                    
Debt Conversion, Converted Instrument, Amount   159,800                
Second Lien PIK Toggle Notes [Member] | Minimum [Member] | Refinancing Transaction [Member]                    
Debt Instrument, Interest Rate, Stated Percentage 9.00%                 9.00%
Second Lien PIK Toggle Notes [Member] | Maximum [Member] | Refinancing Transaction [Member]                    
Debt Instrument, Interest Rate, Stated Percentage 10.75%                 10.75%
Third Lien PIK Toggle Notes [Member] | Refinancing Transaction [Member]                    
Extinguishment of Debt, Amount $ 160,900                  
Third Lien PIK Toggle Notes [Member] | Debt Exchange Transaction [Member]                    
Debt Conversion, Converted Instrument, Amount   $ 142,000                
Third Lien PIK Toggle Notes [Member] | Minimum [Member] | Refinancing Transaction [Member]                    
Debt Instrument, Interest Rate, Stated Percentage 8.50%                 8.50%
Third Lien PIK Toggle Notes [Member] | Maximum [Member] | Refinancing Transaction [Member]                    
Debt Instrument, Interest Rate, Stated Percentage 10.00%                 10.00%
Second and Third Lien PIK Toggle Notes [Member] | Long-term Debt [Member]                    
Gain (Loss) on Extinguishment of Debt, Total               $ (400)    
Basic Earnings Per Share Adjustment, Pro Forma | $ / shares               $ 0.06    
Interest Paid, Excluding Capitalized Interest, Operating Activities         $ 8,200