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Restructuring Charges (Narrative) (Details) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) number_of_employees | Dec. 31, 2018 USD ($) number_of_employees | Dec. 31, 2017 USD ($) number_of_employees
2019 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs | $ 6,449 |  |
Number of employees reduced in connection with workforce of certain facilities | number_of_employees | 468 |  |
Other exit costs | $ 1,597 |  |
2018 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs |  | $ 2,815 |
Number of employees reduced in connection with workforce of certain facilities | number_of_employees |  | 490 |
Other exit costs |  | $ 1,773 |
2017 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs |  |  | $ 2,172
Number of employees reduced in connection with workforce of certain facilities | number_of_employees |  |  | 163
Other exit costs |  |  | $ 531
Facility lease obligations |  |  | 264
Americas [Member] | 2019 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs | $ 4,499 |  |
Number of employees reduced in connection with workforce of certain facilities | number_of_employees | 386 |  |
Other exit costs | $ 1,561 |  |
Americas [Member] | 2018 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs |  | $ 2,496 |
Number of employees reduced in connection with workforce of certain facilities | number_of_employees |  | 432 |
Other exit costs |  | $ 1,773 |
Americas [Member] | 2017 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs |  |  | $ 1,985
Number of employees reduced in connection with workforce of certain facilities | number_of_employees |  |  | 160
Other exit costs |  |  | $ 531
Facility lease obligations |  |  | 264
Asia [Member] | 2019 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs | $ 1,950 |  |
Number of employees reduced in connection with workforce of certain facilities | number_of_employees | 81 |  |
Other exit costs | $ 36 |  |
Asia [Member] | 2018 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs |  | $ 274 |
Number of employees reduced in connection with workforce of certain facilities | number_of_employees |  | 23 |
Other exit costs |  | $ 0 |
Asia [Member] | 2017 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs |  |  | $ 187
Number of employees reduced in connection with workforce of certain facilities | number_of_employees |  |  | 3
Other exit costs |  |  | $ 0
Facility lease obligations |  |  | $ 0
Europe [Member] | 2019 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs | $ 0 |  |
Number of employees reduced in connection with workforce of certain facilities | number_of_employees | 1 |  |
Other exit costs | $ 0 |  |
Europe [Member] | 2018 [Member] |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Employee termination costs |  | $ 45 |
Number of employees reduced in connection with workforce of certain facilities | number_of_employees |  | 35 |
Other exit costs |  | $ 0 |

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