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Restructuring Charges (Details 2) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | $ 2,029 | $ 1,530 |
Restructuring Charges |  | 800 | $ 6,700
Restructuring Costs | 18,772 | 774 |
Restructuring Reserve, Current | 1,290 | 423 | 6,539
Payments for Restructuring | (18,256) | (5,869) |
Restructuring Reserve, Foreign Currency Translation Gain (Loss) |  | (134) |
Restructuring Reserve, Accrual Adjustment | (17) | (48) |
Employee Severance [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 915 | 53 | 2,505
Restructuring Charges |  | 600 | 1,900
Restructuring Costs | 15,983 | 25 |
Payments for Restructuring | (15,104) | (2,683) |
Restructuring Reserve, Foreign Currency Translation Gain (Loss) |  | (77) |
Restructuring Reserve, Accrual Adjustment | (17) | 129 |
government incentive repayment [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 0 | 0 | 1,884
Restructuring Costs | 0 | 0 |
Payments for Restructuring | 0 | (1,769) |
Restructuring Reserve, Foreign Currency Translation Gain (Loss) |  | (57) |
Restructuring Reserve, Accrual Adjustment | 0 | (172) |
Special Termination Benefits [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 1,114 | 1,477 | 1,845
Restructuring Costs | 0 |  |
Buy-out agreement |  | 0 |
Payments for Restructuring | (363) | (368) |
Restructuring Reserve, Foreign Currency Translation Gain (Loss) |  | 0 |
Restructuring Reserve, Accrual Adjustment | 0 | 0 |
Other Restructuring [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 0 | 0 | 305
Restructuring Costs | 0 | 168 |
Payments for Restructuring | 0 | (468) |
Restructuring Reserve, Foreign Currency Translation Gain (Loss) |  | 0 |
Restructuring Reserve, Accrual Adjustment | 0 | (5) |
Business Restructuring Reserves [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges |  |  | 4,200
Facility Closing [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Reserve | 0 | 0 | $ 0
Restructuring Charges | 2,789 | 581 |
Payments for Restructuring | (2,789) | (581) |
Restructuring Reserve, Foreign Currency Translation Gain (Loss) |  | 0 |
Restructuring Reserve, Accrual Adjustment | $ 0 | $ 0 |

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