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Leases - Weighted Average Remaining Lease Term and Weighted Average Discount Rate (Details)
Dec. 31, 2019
Weighted average remaining lease term (years):  
Weighted-average remaining lease term, operating leases 5 years 9 months 18 days
Weighted-average remaining lease term, finance leases 5 years 10 months 24 days
Weighted average discount rate:  
Weighted-average discount rate, operating leases 3.42%
Weighted-average discount rate, finance leases 4.18%