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Management Actions (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2017 | Mar. 31, 2017 | Sep. 30, 2018 | Dec. 31, 2017
Restructuring Cost and Reserve [Line Items] |  |  |  |
Approximate time anticipated savings will offset the restructuring charge | 1 year | 1 year |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Restructuring Charges, net of noncash expenses |  |  |  | $ 9,558
Restructuring Reserve beginning balance |  |  | $ 3,436 |
Cash Payments |  |  | (1,694) | (6,312)
Foreign currency adjustments |  |  | (64) | 190
Restructuring Reserve ending balance | $ 3,436 |  | $ 1,678 | $ 3,436
Selling and Administrative Expense |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Restructuring Charges | $ 2,501 | $ 8,018 |  |
Other associated restructuring charges |  | $ 961 |  |

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