Revenue from Contracts with Customers - Narrative (Details) $ in Thousands |
3 Months Ended | 9 Months Ended | |||
|---|---|---|---|---|---|
|
Sep. 30, 2018
USD ($)
|
Sep. 30, 2017
USD ($)
|
Sep. 30, 2018
USD ($)
business_line
|
Sep. 30, 2017
USD ($)
|
Dec. 31, 2017
USD ($)
|
|
| Revenue from Contract with Customer [Abstract] | |||||
| Number of business lines | business_line | 2 | ||||
| Disaggregation of Revenue [Line Items] | |||||
| Typical payment term | 30 days | ||||
| Revenues | $ 123,395 | $ 118,308 | $ 351,673 | $ 326,186 | |
| Capitalized mobilization costs | 6,400 | 6,400 | $ 3,100 | ||
| Capitalized contract cost, amortization | 1,800 | 3,900 | |||
| Reimbursable revenue | |||||
| Disaggregation of Revenue [Line Items] | |||||
| Revenues | $ 13,400 | $ 15,000 | $ 40,400 | $ 45,500 | |
| Minimum | |||||
| Disaggregation of Revenue [Line Items] | |||||
| Revenue, remaining performance obligation, expected timing of satisfaction, period | 2 | ||||
| Maximum | |||||
| Disaggregation of Revenue [Line Items] | |||||
| Revenue, remaining performance obligation, expected timing of satisfaction, period | 60 | ||||
| X | ||||||||||
- Definition Contract With Customer, Typical Payment Term No definition available.
|
| X | ||||||||||
- Definition Number Of Business Lines No definition available.
|
| X | ||||||||||
- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Description of effect, from relationship that timing of satisfaction of performance obligation has on timing of payment, on right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time and on obligation to transfer good or service to customer for which consideration from customer has been received or is due. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|