Quarterly report pursuant to Section 13 or 15(d)

Acquisitions??and Divestiture (Narrative - Acquisitions) (Details)

v3.20.1
Acquisitions and Divestiture (Narrative - Acquisitions) (Details)
$ / shares in Units, $ in Thousands, shares in Millions
 3 Months Ended 12 Months Ended
Dec. 20, 2019
USD ($)
$ / shares
shares
Mar. 31, 2020
USD ($)
Mar. 31, 2020
USD ($)
Mar. 31, 2019
USD ($)
Dec. 31, 2019
USD ($)
Business Acquisition [Line Items]          
Revenues     $ 289,919 $ 153,047  
Total operating expenses     242,059 $ 109,998  
Carrizo Oil & Gas, Inc.          
Business Acquisition [Line Items]          
Acquisition related costs         $ 15,600
8.875% Preferred Stock | Carrizo Oil & Gas, Inc.          
Business Acquisition [Line Items]          
Preferred stock cumulative cash dividends rate 8.875%        
Carrizo Oil & Gas, Inc.          
Business Acquisition [Line Items]          
Share conversion ratio 1.75        
Equity interest issued, number of shares (in shares) | shares 168.2        
Equity interest issued, price per share (in dollars per share) | $ / shares $ 4.55        
Total consideration $ 765,373        
Revenues     161,400    
Total operating expenses     52,200    
Acquisition related costs         $ 58,800
Restructuring charges   $ 90,200 15,800    
Carrizo Oil & Gas, Inc. | Accounts Payable and Accrued Liabilities          
Business Acquisition [Line Items]          
Restructuring reserve   26,000 26,000    
Carrizo Oil & Gas, Inc. | Employee Severance          
Business Acquisition [Line Items]          
Restructuring charges   31,800 3,000    
Carrizo Oil & Gas, Inc. | Acquisition & Integration          
Business Acquisition [Line Items]          
Restructuring charges   $ 58,400 $ 12,800