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Restructuring and Related Impairment Charges - Restructuring Reserve (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2021
Employee Related Costs | Restructuring Plan, 2020, 2018 and 2017 |  |
Restructuring Reserve [Roll Forward] |  |
Balance at January 1, 2021 |  | $ 12,868
Net additions (recoveries) charged to expense |  | (845)
Cash payments charged against reserve |  | (5,471)
Foreign exchange and other |  | (1,086)
Balance at September 30, 2021 | $ 5,466 | 5,466
Contract Exit Costs | Restructuring Plan, 2020, 2018 and 2017 |  |
Restructuring Reserve [Roll Forward] |  |
Balance at January 1, 2021 |  | 61,642
Net additions (recoveries) charged to expense |  | 17,814
Cash payments charged against reserve |  | (45,378)
Foreign exchange and other |  | (1,443)
Balance at September 30, 2021 | 32,635 | 32,635
Other Restructuring Related Costs | Restructuring Plan, 2020, 2018 and 2017 |  |
Restructuring Reserve [Roll Forward] |  |
Balance at January 1, 2021 |  | 6,098
Net additions (recoveries) charged to expense |  | (872)
Cash payments charged against reserve |  | (6,078)
Foreign exchange and other |  | 140
Balance at September 30, 2021 | (712) | (712)
Abandoned Facilities and Write Off of Fixed Assets | 2020 Restructuring Plan |  |
Restructuring Reserve [Roll Forward] |  |
Net additions (recoveries) charged to expense | $ 6,400 | $ 10,300

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