LEASES - Weighted average remaining lease term and discount rate (Details)	Dec. 31, 2021	Dec. 31, 2020
LEASES
Operating lease, weighted-average remaining lease term (in years)	6 years 2 months 4 days	4 years 6 months 3 days
Finance lease, weighted-average remaining lease term (in years)	2 years 10 months 24 days	10 months 17 days
Operating lease, weighted-average discount rate (as a percent)	5.10%	5.22%
Finance lease, weighted-average discount rate (as a percent)	4.86%	5.84%