Debt - Component of Long Term Debt (Details) - USD ($) $ in Thousands |
Sep. 30, 2018 |
Sep. 21, 2018 |
Feb. 12, 2018 |
Dec. 31, 2017 |
|---|---|---|---|---|
| Debt | ||||
| Long-term debt | $ 268,383 | $ 483,225 | ||
| Term Loans | ||||
| Debt | ||||
| Principal outstanding | 280,000 | 499,750 | ||
| Unamortized debt issuance costs | (7,953) | (11,442) | ||
| Unamortized debt discount | (3,664) | $ (900) | (5,083) | |
| Long-term debt | $ 268,383 | $ 483,225 | ||
| Principal amount | $ 360,000 | |||
| RBC and Barclays | Harvest | Maximum | ||||
| Debt | ||||
| Principal amount | $ 265,000 |