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LEASES - Lease Term and Discount Rate (Details)
Dec. 31, 2020
Dec. 31, 2019
Weighted-average remaining lease term (years)    
Operating leases 7 years 4 months 24 days 7 years
Finance leases 4 years 6 months 5 years 2 months 12 days
Weighted-average discount rate    
Operating leases 2.70% 4.60%
Finance leases 1.40% 1.40%