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GOODWILL AND LONG-LIVED ASSETS - Schedule of Impairment Charges Presented within Statement of Operations (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Impairment of long-lived assets | $ 7,651 | $ 3,296 | $ 7,651 | $ 39,550
Long-lived asset impairment: |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Impairment of long-lived assets | 0 | 0 | 0 | 22,351
Long-lived asset impairment: | North America |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Impairment of long-lived assets | 0 | 0 | 0 | 0
Long-lived asset impairment: | International |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Impairment of long-lived assets | 0 | 0 | 0 | 22,351
Restructuring and related charges: |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Impairment of long-lived assets | 7,651 | 3,296 | 7,651 | 17,199
Restructuring and related charges: | North America |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Impairment of long-lived assets | 5,430 | 834 | 5,430 | 14,322
Restructuring and related charges: | International |  |  |  |
Impaired Long-Lived Assets Held and Used [Line Items] |  |  |  |
Impairment of long-lived assets | $ 2,221 | $ 2,462 | $ 2,221 | $ 2,877

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