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DISPOSITIONS AND DISCONTINUED OPERATIONS - Loss from Discontinued Operations (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2022
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Revenue                 $ 361,872 $ 467,106 $ 472,360
Expenses:                      
Direct operating expenses                 284,658 346,000 382,740
Selling, general and administrative expenses                 77,659 105,683 125,607
Depreciation and amortization                 16,516 35,974 40,057
Impairment charges                 0 16,870 0
Other expense (income), net                 13,835 1,104 (2,998)
Loss from discontinued operations before net loss on disposal and income taxes                 (30,796) (38,525) (73,046)
Loss on disposal, net                 (104,533) 0 0
Income tax expense attributable to discontinued operations                 (16,380) (8,560) (1,930)
Loss from discontinued operations, net of income taxes $ 617 $ (211,736) $ 2,227 $ 57,183 $ (7,058) $ (19,982) $ 8,622 $ (28,667) $ (151,709) (47,085) (74,976)
Europe-South                      
Expenses:                      
Selling, general and administrative expenses                   $ 4,700 $ 4,600