Accrued Expenses and Other Liabilities - Other Noncurrent Liabilities (Details) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Summary of other noncurrent liabilities | ||
| Straight-line lease liability | $ 2,421 | $ 2,751 |
| Asset retirement obligations | 1,140 | 1,062 |
| Other | 1,295 | 1,097 |
| Total | $ 4,856 | $ 4,910 |