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Restructuring - Narrative (Details) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020 | Dec. 31, 2020 | Dec. 31, 2018
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | $ 0 | $ 18,089,000 | $ 0 | $ 18,089,000 |  |
Impairment of right-of-use assets | 0 |  | 0 | $ 5,411,000 | $ 5,400,000 |
Other liabilities |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring reserve, current | 4,400,000 |  | 4,400,000 |  |  |
Non-current other liabilities |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring reserve, noncurrent | 2,600,000 |  | 2,600,000 |  |  |
Resource rationalization, 2020 |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges | $ 0 |  | 0 |  | 18,089,000 |
Resource rationalization, 2020 | Workforce reductions |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges |  |  |  |  | 11,391,000 |
Resource rationalization, 2020 | Onerous Lease |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges |  |  |  |  | 6,698,000 |
Resource rationalization, 2020 | Other restructuring |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges |  |  |  |  | $ 1,300,000 |
Resource rationalizations 2018 |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges |  |  | $ 0 |  |  | $ 12,490,000
Resource rationalizations 2018 | Workforce reductions |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges |  |  |  |  |  | 9,684,000
Resource rationalizations 2018 | Onerous Lease |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |
Restructuring Charges |  |  |  |  |  | $ 2,806,000

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