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Fair Value Measurements (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Financial assets    
Derivative asset - current $ 196 $ 7,509
Derivative asset - noncurrent 1,495 396
Financial liabilities    
Derivative liability - current 25,063 1,135
Derivative liability - noncurrent 2,566 173
Fair Value on a Recurring Basis    
Financial assets    
Derivative asset - current 196 7,509
Derivative asset - noncurrent 1,495 396
Total financial assets 1,691 7,905
Financial liabilities    
Derivative liability - current 25,063 1,135
Derivative liability - noncurrent 2,566 173
Total financial liabilities 27,629 1,308
Level 1 | Fair Value on a Recurring Basis    
Financial assets    
Derivative asset - current 0 0
Derivative asset - noncurrent 0 0
Total financial assets 0 0
Financial liabilities    
Derivative liability - current 0 0
Derivative liability - noncurrent 0 0
Total financial liabilities 0 0
Level 2 | Fair Value on a Recurring Basis    
Financial assets    
Derivative asset - current 196 7,509
Derivative asset - noncurrent 1,495 396
Total financial assets 1,691 7,905
Financial liabilities    
Derivative liability - current 25,063 1,135
Derivative liability - noncurrent 2,566 173
Total financial liabilities 27,629 1,308
Level 3 | Fair Value on a Recurring Basis    
Financial assets    
Derivative asset - current 0 0
Derivative asset - noncurrent 0 0
Total financial assets 0 0
Financial liabilities    
Derivative liability - current 0 0
Derivative liability - noncurrent 0 0
Total financial liabilities $ 0 $ 0