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Derivative Instruments - Fair Value of Derivative Instruments (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Derivative [Line Items]    
Total Current Assets $ 95,002 $ 84,657
Total Other Non-Current Assets 131,994 188,237
Total Current Liabilities 521,598 42,329
Total Non-Current Liabilities 687,354 127,290
Commodity Swaps    
Derivative [Line Items]    
Total Current Assets 92 53,668
Total Other Non-Current Assets 12,419 134,661
Total Current Liabilities 505,460 23,506
Total Non-Current Liabilities 642,442 59,388
Basis Only Swaps    
Derivative [Line Items]    
Total Current Assets 94,682 30,848
Total Other Non-Current Assets 119,077 52,903
Total Current Liabilities 13,206 14,491
Total Non-Current Liabilities 41,332 57,150
Interest Rate Swaps    
Derivative [Line Items]    
Total Current Assets 228 141
Total Other Non-Current Assets 498 673
Total Current Liabilities 2,932 4,332
Total Non-Current Liabilities $ 3,580 $ 10,752