Other (Details) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
|
Dec. 31, 2017
USD ($)
contract
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
|
| Operating Leases And Other Property Plant And Equipment [Line Items] | |||
| Rig termination fee as reduced rental payments | $ | $ 0 | $ 0 | $ 3,075 |
| Horizontal Drilling Rig [Member] | |||
| Operating Leases And Other Property Plant And Equipment [Line Items] | |||
| Number of contracts | contract | 5 | ||
| X | ||||||||||
- Definition Number of contracts. No definition available.
|
| X | ||||||||||
- Definition Operating Leases And Other Property Plant And Equipment [Line Items] No definition available.
|
| X | ||||||||||
- Definition Rig termination fee. No definition available.
|
| X | ||||||||||
- Details
|