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Lease Commitments - Lease Terms and Assumptions (Details)
Dec. 31, 2021
Dec. 31, 2020
Weighted average remaining lease term (years)    
Operating leases 6 years 10 months 24 days 7 years 4 months 24 days
Finance leases 3 years 7 months 6 days 4 years 2 months 12 days
Weighted average discount rate    
Operating leases 2.80% 2.90%
Finance leases 1.00% 1.00%