Accounts Receivable, Accounts Payable and Accrued Expenses - Accounts Receivable (Details) - USD ($) $ in Thousands |
Jun. 30, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||
| Accrued oil and gas sales | $ 26,742 | $ 11,596 |
| Joint interest billings | 7,713 | 2,942 |
| Hedge settlements | 292 | 194 |
| Other | 62 | 2 |
| Accounts receivable, net | $ 34,809 | $ 14,734 |