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LEASES - Weighted average remaining lease terms and discount rates (Details)
Mar. 31, 2020
Dec. 31, 2019
LEASES    
Operating leases, weighted average remaining lease term 6 years 4 months 24 days 6 years 6 months
Financing leases, weighted average remaining lease term 11 years 8 months 12 days 11 years 8 months 12 days
Operating leases, weighted average discount rate 5.10% 5.00%