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RESTRUCTURING AND FACILITIES CONSOLIDATION INITIATIVES - Narrative (Details) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 USD ($) employee | Mar. 31, 2021 USD ($) | Dec. 31, 2021 USD ($)
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and related | $ 4,814 | $ 5,950 |
Long-term portion of accrued restructuring | 1,400 |  | $ 1,600
Facilities |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Accrual for future anticipated variable lease costs | 1,400 |  | 1,600
2022 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring charges, net of adjustments | $ 4,200 |  |
Number of positions eliminated | employee | 50 |  |
2022 Restructuring Plan | Severance |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring and related | $ 4,179 |  |
Accrual for future anticipated variable lease costs | 3,814 |  | $ 0
2020 Restructuring Plan | Severance |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Accrual for future anticipated variable lease costs | 800 |  |
2019 Restructuring Plan | Facilities |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Accrual for future anticipated variable lease costs | $ 1,400 |  |
2019 Restructuring Plan | Facilities | Minimum |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Lease terms | 1 year |  |
2019 Restructuring Plan | Facilities | Maximum |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Lease terms | 6 years |  |

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- Definition Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=123408670&loc=SL77918673-209980 + Details
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