Leases - Schedule of Lease Expenses and Other Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 9 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2020 |
Sep. 30, 2019 |
Sep. 30, 2020 |
Sep. 30, 2019 |
|
| Lessee, Lease, Description [Line Items] | ||||
| Weighted-average discount rate | 4.96% | 4.96% | ||
| Weighted-average remaining lease term (years) | 1 year 3 months 7 days | 1 year 3 months 7 days | ||
| Lease costs | ||||
| Operating lease cost | $ 1,258 | $ 9,361 | $ 7,529 | $ 30,754 |
| Variable lease cost | 53 | 1,819 | 5,074 | 3,323 |
| Short-term lease cost(2) | 5,823 | 18,679 | 37,650 | 47,587 |
| Total lease cost | $ 7,134 | $ 29,859 | 50,253 | $ 81,664 |
| Drill Rig Lease Costs | ||||
| Lease costs | ||||
| Short-term lease cost(2) | $ 15,800 | |||