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STOCK-BASED COMPENSATION - Stock Option Valuation Assumptions (Details) - Stock options
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Stock options      
Average risk-free interest rates 1.27% 0.66% 2.02%
Weighted-average life (years) 7 years 7 years 7 years
Expected volatility 41.20% 30.90% 21.80%
Expected dividend yield 1.08% 2.20% 0.84%