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STOCK-BASED COMPENSATION PLANS - Summary of assumptions used (Details) - Stock Appreciation Rights
3 Months Ended 12 Months Ended
Mar. 31, 2022
Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Risk-free interest rate 2.37% 1.40%
Expected volatility 35.83% 35.52%
Expected life (in years) 7 years 4 months 24 days 7 years 8 months 12 days
Expected dividend yield 3.52% 3.20%