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SHARE-BASED AWARDS AND STOCK OPTIONS - Share-Based Awards - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 65,611 $ 42,276 $ 146,097 $ 105,081
Restricted Stock Awards and Performance Units        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Fair value of share-based awards vested     178,900 77,900
Share-based compensation expense 62,200 $ 38,900 135,600 $ 94,900
Compensation not yet recognized $ 204,900   $ 204,900  
Weighted-average period of unrecognized compensation cost     2 years 1 month 6 days