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Contingencies and Environmental Liabilities - Environmental Litigation and Matters - Narrative (Details) € in Thousands, $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2018 USD ($) | Dec. 31, 2018 EUR (€) | Dec. 31, 2012 USD ($) | Dec. 31, 2017 USD ($)
Site Contingency [Line Items] |  |  |  |
Accrued liabilities for environmental matters | $ 71,000 |  |  | $ 82,000
Term for paying off environmental liabilities | 15 years | 15 years |  |
Aggregate possible expenditure on environmental matters in excess of amounts accrued | $ 60,000 |  |  |
Oss Netherlands |  |  |  |
Site Contingency [Line Items] |  |  |  |
Environmental remediation expense |  | € 400 | $ 235 |

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