Debt - Component of Long Term Debt (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | |
|---|---|---|---|---|
Jun. 30, 2019 |
Jun. 30, 2019 |
Dec. 31, 2018 |
Jul. 01, 2019 |
|
| Debt | ||||
| Principal outstanding | $ 280,000 | $ 280,000 | $ 280,000 | |
| Unamortized debt issuance costs | (6,992) | (6,992) | (7,629) | |
| Unamortized debt discount | (3,221) | (3,221) | (3,514) | |
| Long-term debt | $ 269,787 | $ 269,787 | $ 268,857 | |
| Average effective interest rate (as a percent) | 5.95% | 6.08% | ||
| Effective interest rate (as a percent) | 7.91% | 7.91% | 6.22% | |
| Term Loans | ||||
| Debt | ||||
| Principal amount | $ 1,100,000 | |||
| Annual amortization percentage | 1.00% | |||
| Repayments of debt | $ 0 | $ 80,000 | ||
| Due February 2025 | ||||
| Debt | ||||
| Principal outstanding | $ 280,000 | $ 280,000 | $ 280,000 |