Related Parties - Additional Information (Details) - USD ($) $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
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| Related Party Transaction [Line Items] | |||
| Principal | $ 889,790 | $ 873,733 | |
| Airplane Services | |||
| Related Party Transaction [Line Items] | |||
| Related party transactions | 1,200 | 1,100 | $ 1,100 |
| Marine Transportation and Logistic Services | |||
| Related Party Transaction [Line Items] | |||
| Related party transactions | 200 | ||
| Payments to related party transactions | $ 22,800 | ||
| Marine Transportation and Logistic Services | Maximum | |||
| Related Party Transaction [Line Items] | |||
| Related party transactions | $ 200 | 200 | |
| CEO and Largest Shareholder | Second Lien Term Loan | |||
| Related Party Transaction [Line Items] | |||
| Principal | $ 5,000 | ||
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- Definition Face (par) amount of debt instrument at time of issuance. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of transactions with related party during the financial reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- 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.
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- Definition The cash outflow for the payment of a long-term borrowing made from a related party where one party can exercise control or significant influence over another party; including affiliates, owners or officers and their immediate families, pension trusts, and so forth. Alternate caption: Payments for Advances from Affiliates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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