Accrued Expenses - Components of Current Liabilities (Details) - USD ($) $ in Thousands |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|---|
| Payables and Accruals [Abstract] | |||
| Salaries and wages | $ 32,959 | $ 41,216 | |
| Warranty cost | 23,302 | 22,820 | $ 30,738 |
| Taxes other than income taxes, primarily Value Added Taxes | 19,194 | 21,424 | |
| Freight | 5,211 | 5,978 | |
| Professional | 4,728 | 5,774 | |
| Product liability, current portion | 3,996 | 3,127 | |
| Interest | 3,747 | 872 | |
| Severance | 2,049 | 2,477 | |
| Derivatives (foreign currency forward exchange contracts) | 1,783 | 2,014 | |
| Deferred revenue | 1,446 | 400 | |
| Insurance | 742 | 695 | |
| Rent | 672 | 402 | |
| Supplemental Executive Retirement Plan (SERP) | 391 | 1,279 | |
| Rebates | 356 | 1,791 | |
| Other items, principally trade accruals | 9,519 | 8,687 | |
| Accrued expenses | $ 110,095 | $ 118,956 |