Basis of Presentation and Significant Accounting Policies - Narrative (Details) - USD ($) $ in Thousands |
6 Months Ended | 12 Months Ended |
|---|---|---|
Jun. 30, 2018 |
Dec. 31, 2017 |
|
| Related Party Transaction [Line Items] | ||
| Bad debt expense | $ 53,790 | $ 16,206 |
| Oil And Natural Gas Industry | ||
| Related Party Transaction [Line Items] | ||
| Bad debt expense | 200 | 200 |
| Puerto Rico Electric Power Authority (PREPA) | ||
| Related Party Transaction [Line Items] | ||
| Bad debt expense | $ 53,600 | $ 16,000 |
| X | ||||||||||
- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. 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 | ||||||||||
- Details
|
| X | ||||||||||
- Details
|