Restructuring - Summary of Restructuring Charges (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2020 |
Jun. 30, 2019 |
Jun. 30, 2020 |
Jun. 30, 2019 |
|
| Restructuring Cost and Reserve [Line Items] | ||||
| Total Restructuring Expenses | $ 6,991 | $ 18,738 | $ 29,277 | $ 32,019 |
| Right-of-Use Asset Impairment | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total Restructuring Expenses | 2,456 | 14,287 | 18,634 | 23,010 |
| Operating Lease Charges | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total Restructuring Expenses | 1,557 | 979 | 2,570 | 1,778 |
| Severance | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total Restructuring Expenses | 2,694 | 1,856 | 4,725 | 2,992 |
| Fixed Asset Impairment | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total Restructuring Expenses | 263 | 1,072 | 2,952 | 2,569 |
| Other Expenses | ||||
| Restructuring Cost and Reserve [Line Items] | ||||
| Total Restructuring Expenses | $ 21 | $ 544 | $ 396 | $ 1,670 |