XML 37 R38.htm IDEA: XBRL DOCUMENT v3.20.1
Fair Value Measurements (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Fair Value Assets And Liabilities Measured On Recurring Basis [Line Items]    
Document Period End Date Mar. 31, 2020  
Proved Oil and Gas Properties, Other Property, Plant and Equipment and Other Assets [Abstract]    
Proved Oil and Gas Properties and Other Assets Carrying Amount $ 1,813,000  
Proved Oil and Gas Properties and Other Assets Written Down During the Period - Fair value at End of Period 357,000  
Pretax Impairment Charges for Proved Oil and Gas Properties, Other Property, Plant and Equipment and Other Assets 1,456,000  
Debt Disclosure [Abstract]    
Aggregate Principal Amount of Current and Long-Term Debt 5,140,000  
Estimated Fair Value of Debt 5,145,000 $ 5,452,000
Commodity Contract [Member] | Crude Oil | Price Swaps    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 898,090  
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure   23,266
Commodity Contract [Member] | Crude Oil | Price Swaps | Fair Value, Inputs, Level 1 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 0  
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure   0
Commodity Contract [Member] | Crude Oil | Price Swaps | Fair Value, Inputs, Level 2 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 898,090  
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure   23,266
Commodity Contract [Member] | Crude Oil | Price Swaps | Fair Value, Inputs, Level 3 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 0  
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure   0
Commodity Contract [Member] | Crude Oil | Basis Swaps    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 888  
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure 93  
Commodity Contract [Member] | Crude Oil | Basis Swaps | Fair Value, Inputs, Level 1 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 0  
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure 0  
Commodity Contract [Member] | Crude Oil | Basis Swaps | Fair Value, Inputs, Level 2 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 888  
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure 93  
Commodity Contract [Member] | Crude Oil | Basis Swaps | Fair Value, Inputs, Level 3 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 0  
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure 0  
Commodity Contract [Member] | Crude Oil | Roll Differential Swap    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 7,255  
Commodity Contract [Member] | Crude Oil | Roll Differential Swap | Fair Value, Inputs, Level 1 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 0  
Commodity Contract [Member] | Crude Oil | Roll Differential Swap | Fair Value, Inputs, Level 2 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 7,255  
Commodity Contract [Member] | Crude Oil | Roll Differential Swap | Fair Value, Inputs, Level 3 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 0  
Commodity Contract [Member] | Natural Gas | Collars    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 3,678  
Commodity Contract [Member] | Natural Gas | Collars | Fair Value, Inputs, Level 1 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 0  
Commodity Contract [Member] | Natural Gas | Collars | Fair Value, Inputs, Level 2 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 3,678  
Commodity Contract [Member] | Natural Gas | Collars | Fair Value, Inputs, Level 3 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 0  
Commodity Contract [Member] | Natural Gas | Basis Swaps    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure   970
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure 7,712  
Commodity Contract [Member] | Natural Gas | Basis Swaps | Fair Value, Inputs, Level 1 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure   0
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure 0  
Commodity Contract [Member] | Natural Gas | Basis Swaps | Fair Value, Inputs, Level 2 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure   970
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure 7,712  
Commodity Contract [Member] | Natural Gas | Basis Swaps | Fair Value, Inputs, Level 3 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure   0
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure 0  
Commodity Contract [Member] | Natural Gas Liquids | Price Swaps    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 30,822 3,401
Commodity Contract [Member] | Natural Gas Liquids | Price Swaps | Fair Value, Inputs, Level 1 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 0 0
Commodity Contract [Member] | Natural Gas Liquids | Price Swaps | Fair Value, Inputs, Level 2 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 30,822 3,401
Commodity Contract [Member] | Natural Gas Liquids | Price Swaps | Fair Value, Inputs, Level 3 [Member]    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure 0 0
Assets From Price Risk Management Activities    
Financial Assets: [Abstract]    
Assets, Fair Value Disclosure $ 933,000 1,000
Liabilities From Price Risk Management Activities [Member]    
Financial Liabilities:    
Financial and Nonfinancial Liabilities, Fair Value Disclosure   $ 20,000