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Long-Term Debt - Narrative (Details)
1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended
Jan. 01, 2022
USD ($)
Oct. 15, 2021
USD ($)
Sep. 30, 2022
USD ($)
$ / shares
Apr. 30, 2020
USD ($)
day
$ / shares
Sep. 30, 2022
USD ($)
$ / shares
Sep. 30, 2021
USD ($)
Sep. 30, 2022
USD ($)
$ / shares
Sep. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jun. 30, 2021
USD ($)
Debt Instrument [Line Items]                        
Loss on Debt Extinguishment         $ 9,953,000 $ 18,653,000 $ 22,934,000 $ 18,653,000        
Debt instrument, face amount       $ 1,000                
Proceeds from issuance of convertible senior notes                 $ 334,650,000      
Long-Term Debt     $ 1,920,440,000   1,920,440,000   1,920,440,000       $ 2,214,121,000  
Retained earnings     (613,426,000)   (613,426,000)   (613,426,000)       877,894,000  
Deferred Income Taxes     (146,621,000)   (146,621,000)   (146,621,000)       (328,601,000)  
Decrease in stockholders equity     $ (1,976,988,000)   $ (1,976,988,000) (3,186,516,000) $ (1,976,988,000) (3,186,516,000) $ (4,422,437,000) $ (2,537,024,000) (3,700,273,000) $ (4,136,931,000)
Cumulative Effect, Period of Adoption, Adjustment                        
Debt Instrument [Line Items]                        
Decrease in stockholders equity                     59,337,000  
Accounting Standards Update 2020-06                        
Debt Instrument [Line Items]                        
Long-Term Debt $ 82,327,000                      
Value of the embedded conversion 107,260,000                      
Retained earnings (5,986,000)                      
Deferred Income Taxes 22,990,000                      
Decrease in stockholders equity 78,284,000                      
Accounting Standards Update 2020-06 | Cumulative Effect, Period of Adoption, Adjustment                        
Debt Instrument [Line Items]                        
Retained earnings $ 24,933,000                      
Capped Call Transaction                        
Debt Instrument [Line Items]                        
Cost incurred in connection with Capped Calls       $ 35,673,000                
Capped Call Transaction | Call Option | Minimum                        
Debt Instrument [Line Items]                        
Strike price (in usd per share) | $ / shares       $ 12.84                
Capped Call Transaction | Call Option | Maximum                        
Debt Instrument [Line Items]                        
Strike price (in usd per share) | $ / shares       $ 18.19                
Senior Notes due March 2027                        
Debt Instrument [Line Items]                        
Stated rate, debt instrument     7.25%   7.25%   7.25%          
Debt instrument, unamortized premium     $ 2,401,000   $ 2,401,000   $ 2,401,000       5,609,000  
Purchase and retirement of long term debt         350,000,000              
Loss on Debt Extinguishment         9,953,000              
Debt instrument, face amount     $ 350,000,000   $ 350,000,000   $ 350,000,000       700,000,000  
Convertible Senior Notes due 2026                        
Debt Instrument [Line Items]                        
Stated rate, debt instrument 2.25%   2.25%   2.25%   2.25%          
Debt instrument, face amount     $ 330,654,000   $ 330,654,000   $ 330,654,000       345,000,000  
Senior Notes due April 2030                        
Debt Instrument [Line Items]                        
Stated rate, debt instrument     4.75%   4.75%   4.75%          
Debt instrument, face amount     $ 400,000,000   $ 400,000,000   $ 400,000,000       400,000,000  
Unamortized discount           $ 5,000,000   $ 5,000,000        
6.50% Senior Notes due March 2026                        
Debt Instrument [Line Items]                        
Stated rate, debt instrument     6.50%   6.50% 6.50% 6.50% 6.50%        
Loss on Debt Extinguishment           $ 10,549,000   $ 10,549,000        
Purchase of outstanding debt   $ 246,853,000       165,831,000            
Debt instrument, face amount   234,169,000                    
Redemption premium   11,416,000                    
Accrued interest on redeemed long term debt   $ 1,268,000                    
Cardinal States Gathering Company Credit Facility maturing in March 2028                        
Debt Instrument [Line Items]                        
Loss on Debt Extinguishment           5,830,000   5,830,000        
Purchase of outstanding debt           107,705,000            
CSG Holdings II LLC Credit Facility maturing in March 2027                        
Debt Instrument [Line Items]                        
Loss on Debt Extinguishment           2,274,000   $ 2,274,000        
Purchase of outstanding debt           $ 39,726,000            
Senior Notes due January 2031                        
Debt Instrument [Line Items]                        
Proceeds from issuance of Senior Notes     $ 500,000,000                  
Stated rate, debt instrument     7.375%   7.375%   7.375%          
Debt instrument, unamortized premium     $ 6,250,000   $ 6,250,000   $ 6,250,000          
Debt instrument, face amount     500,000,000   500,000,000   500,000,000          
Convertible Debt | Convertible Senior Notes due 2026                        
Debt Instrument [Line Items]                        
Stated rate, debt instrument       2.25%                
Loss on Debt Extinguishment             12,981,000          
Purchase of outstanding debt             14,346,000          
Debt instrument, face amount       $ 345,000,000                
Unamortized discount     $ 0   $ 0   $ 0       $ 85,950,000  
Conversion ratio (in shares)       77.8816                
Conversion price (in usd per share) | $ / shares     $ 12.84   $ 12.84   $ 12.84          
Threshold percentage of stock price trigger       130.00%                
Debt issuance costs gross       $ 10,350,000                
Convertible Debt | Convertible Senior Notes due 2026 | Debt Instrument, Redemption, Period One                        
Debt Instrument [Line Items]                        
Threshold trading days | day       20                
Threshold consecutive trading days | day       30                
Convertible Debt | Convertible Senior Notes due 2026 | Debt Instrument, Redemption, Period Two                        
Debt Instrument [Line Items]                        
Threshold percentage of stock price trigger       98.00%                
Threshold trading days | day       5                
Threshold consecutive trading days | day       10                
Convertible Debt | Convertible 2.25% Senior Notes Due 2026, Additional Option To Initial Purchasers                        
Debt Instrument [Line Items]                        
Debt instrument, face amount       $ 45,000                
Convertible Debt | Convertible 2.25% Senior Notes Due 2026, Liability Component                        
Debt Instrument [Line Items]                        
Debt issuance costs gross       7,024,000                
Convertible Debt | Convertible 2.25% Senior Notes Due 2026, Equity Component                        
Debt Instrument [Line Items]                        
Debt issuance costs gross       $ 3,326,000