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Accounts Receivable (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Accounts Receivable |  |
Accounts receivable | $ 184,732 | $ 167,536
Oil, gas, and NGL production revenue [Member] |  |
Accounts Receivable |  |
Accounts receivable | 146,308 | 107,230
Amounts due from joint interest owners [Member] |  |
Accounts Receivable |  |
Accounts receivable | 22,681 | 31,497
State severance tax refunds [Member] |  |
Accounts Receivable |  |
Accounts receivable | 4,069 | 4,415
Derivative settlements [Member] |  |
Accounts Receivable |  |
Accounts receivable | 6,868 | 9,475
Other [Member] |  |
Accounts Receivable |  |
Accounts receivable | $ 4,806 | $ 14,919

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