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RESTRUCTURING AND RELATED CHARGES - Narrative (Details) |  | 1 Months Ended | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 05, 2022 position | Apr. 30, 2020 position | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) | Jun. 30, 2023 USD ($) | Jun. 30, 2022 USD ($) | Jul. 31, 2023 USD ($) | Jan. 31, 2023 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Long-lived asset impairment |  |  | $ 0 | $ 8,811,000 | $ 0 | $ 0 | $ 8,811,000 |  |
Restructuring-related impairment |  |  |  | $ 1,200,000 |  | 0 | $ 1,180,000 |  |
600 West Chicago |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Option to lease early termination penalty |  |  |  |  |  |  |  |  | $ 9,600,000
2022 Restructuring Plan, First and Second Phase |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Reduction in number of positions (in employees) | position | 1,000 |  |  |  |  |  |  |  |
2022 Restructuring Plan, First and Second Phase | Minimum |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Expected restructuring cost (up to) |  |  | 20,000,000 |  |  | 20,000,000 |  |  |
2022 Restructuring Plan, First and Second Phase | Maximum |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Expected restructuring cost (up to) |  |  | 27,000,000 |  |  | 27,000,000 |  |  |
2022 Restructuring Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Restructuring and related charges, incurred to date |  |  | 19,100,000 |  |  | 19,100,000 |  |  |
2022 Restructuring Plan Third Phase | Subsequent Event |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Expected restructuring cost (up to) |  |  |  |  |  |  |  | $ 3,600,000 |
2020 Restructuring Plan |  |  |  |  |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |
Reduction in number of positions (in employees) | position |  | 1,600 |  |  |  |  |  |  |
Restructuring and related charges, incurred to date |  |  | $ 108,000,000 |  |  | $ 108,000,000 |  |  |

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