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SHARE-BASED AWARDS AND OPTIONS - Share-Based Compensation Expense (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Share-based Payment Arrangement [Abstract]      
Share-based compensation expense $ 89,634 $ 57,826 $ 39,095
Income tax benefit $ 20,519 $ 13,038 $ 13,849