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COMMITMENTS AND CONTINGENCIES - Leases: Lease Term and Discount Rate (Details)
Jun. 30, 2022
Dec. 31, 2021
Weighted-average remaining lease terms (in years):    
Operating leases 5 years 7 months 6 days 6 years
Finance leases 2 years 3 months 18 days 1 year 9 months 18 days
Weighted-average discount rate:    
Operating leases 2.81% 1.81%
Finance leases 2.80% 2.94%