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Repositioning and Other Changes (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2021 | Jun. 30, 2020 | Jun. 30, 2021 | Jun. 30, 2020
Restructuring Cost and Reserve [Line Items] |  |  |  |
Repositioning costs incurred | $ 663 | $ 0 | $ 6,043 | $ 0
Total Amount Expected to be Incurred in the Repositioning Plan | 7,418 |  | 7,418 |
Cumulative Amount Incurred through June 30, 2021 | 7,318 |  | 7,318 |
Severance and termination benefits |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Repositioning costs incurred | 76 |  | 185 |
Total Amount Expected to be Incurred in the Repositioning Plan | 185 |  | 185 |
Cumulative Amount Incurred through June 30, 2021 | 185 |  | 185 |
Office space consolidation |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Repositioning costs incurred | 0 |  | 2,071 |
Total Amount Expected to be Incurred in the Repositioning Plan | 2,071 |  | 2,071 |
Cumulative Amount Incurred through June 30, 2021 | 2,071 |  | 2,071 |
Professional services |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |
Repositioning costs incurred | 587 |  | 3,787 |
Total Amount Expected to be Incurred in the Repositioning Plan | 5,162 |  | 5,162 |
Cumulative Amount Incurred through June 30, 2021 | $ 5,062 |  | $ 5,062 |

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