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Restructuring Charges - Severance and Other Restructuring Charges Activity (Details) - Optimizing for Growth (formerly Capital Light Initiative) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Restructuring Reserve [Roll Forward] |  |  |  |
Liability at December 31, 2020 |  |  | $ 5,324 |
Charges | $ 11,293 | $ 2,781 | 18,936 | $ 8,584
Payments/Utilization |  |  | (9,954) |
Liability at June 30, 2021 | 14,306 |  | 14,306 |
Severance |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Liability at December 31, 2020 |  |  | 5,294 |
Charges |  |  | 10,374 |
Payments/Utilization |  |  | (4,537) |
Liability at June 30, 2021 | 11,131 |  | 11,131 |
Other restructuring charges |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |
Liability at December 31, 2020 |  |  | 30 |
Charges |  |  | 8,562 |
Payments/Utilization |  |  | (5,417) |
Liability at June 30, 2021 | $ 3,175 |  | $ 3,175 |

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