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SHARE-BASED COMPENSATION PLANS - Summary (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based compensation expense and income tax benefits recognized during the periods      
Share-based compensation expense $ 47,000 $ 29,993 $ 25,828
Income tax benefit (6,641) (4,728) (4,667)
Share-based compensation expense, net of tax 40,359 25,265 21,161
Unvested stock awards      
Share-based compensation expense and income tax benefits recognized during the periods      
Share-based compensation expense 44,163 25,509 19,253
Stock option and employee stock purchase plans      
Share-based compensation expense and income tax benefits recognized during the periods      
Share-based compensation expense $ 2,837 $ 4,484 $ 6,575