Accounts Receivable, Accounts Payable and Accrued Expenses - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands |
Jun. 30, 2018 |
Dec. 31, 2017 |
|---|---|---|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||
| Accrued oil and gas sales receivable, net | $ 63,222 | $ 52,891 |
| Joint interest billings | 37,700 | 25,256 |
| Receivables for divestitures | 416 | 0 |
| Other | 215 | 639 |
| Accounts receivable, net | $ 101,553 | $ 78,786 |