Other Current Assets - Components of Other Current Assets (Details) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
|---|---|---|
| Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract] | ||
| Value added tax receivables | $ 14,336 | $ 18,031 |
| Service contracts | 2,902 | 2,013 |
| Prepaid insurance | 2,761 | 2,538 |
| Derivatives (foreign currency forward contracts) | 2,754 | 4,143 |
| Prepaid inventory | 790 | 158 |
| Recoverable income taxes | 503 | 367 |
| Prepaid debt fees | 489 | 869 |
| Prepaid and other current assets | 6,984 | 6,313 |
| Other current assets | $ 31,519 | $ 34,432 |