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SEGMENT AND GEOGRAPHICAL REPORTING - Revenues by Geographical Location (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]      
Total revenue $ 1,113,921 $ 1,005,266 $ 1,264,851
Reportable Geographical Components | United States      
Segment Reporting Information [Line Items]      
Total revenue 1,031,000 931,000 1,163,000
Reportable Geographical Components | Canada      
Segment Reporting Information [Line Items]      
Total revenue $ 83,000 $ 74,000 $ 102,000