Quarterly report pursuant to Section 13 or 15(d)

Fair Value of Derivative Instruments on Condensed Consolidated Balance Sheets (Details)

v3.20.1
Fair Value of Derivative Instruments on Condensed Consolidated Balance Sheets (Details) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Derivatives, Fair Value [Line Items]    
Derivative assets $ 233,442 $ 4,131
Derivative liabilities 103,092 23,450
Derivative assets 10,963 2,750
Derivative Liability, Noncurrent 10,689 3,385
Derivative Liability 113,781 26,835
Commodity contracts | Current Derivative Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 233,402 4,131
Derivative liabilities 100,202 23,450
Commodity contracts | Noncurrent Derivative Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 10,963 2,750
Derivative Liability, Noncurrent 6,789 3,385
Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Derivative Liability 6,800  
Interest Rate Swap | Current Derivative Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 40 0
Derivative liabilities 2,890 0
Interest Rate Swap | Noncurrent Derivative Contract [Member]    
Derivatives, Fair Value [Line Items]    
Derivative assets 0 0
Derivative Liability, Noncurrent 3,900 0
Fair Value, Measurements, Recurring | Commodity contracts    
Derivatives, Fair Value [Line Items]    
Derivative assets 233,402 4,131
Derivative liabilities 100,202 (23,450)
Derivative assets 10,963 2,750
Derivative Liability, Noncurrent 6,789 $ 3,385
Fair Value, Measurements, Recurring | Interest Rate Swap    
Derivatives, Fair Value [Line Items]    
Derivative assets 40  
Derivative liabilities 2,890  
Derivative assets 0  
Derivative Liability, Noncurrent $ 3,900