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SHARE-BASED COMPENSATION - Schedule of Performance Share Units Activity (Details) - Performance share units - $ / shares
shares in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Stock Units      
Balance, beginning of year 1,098    
Granted 353    
Vested (228)    
Forfeited (20)    
Performance adjustment (99)    
Balance, end of year 1,104 1,098  
Weighted Average Grant Date Fair Value      
Balance, beginning of year $ 32.58    
Granted 38.50 $ 33.16 $ 29.66
Vested 35.49    
Forfeited 35.28    
Performance adjustment 35.49    
Balance, end of year $ 33.56 $ 32.58