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Lessee Leases - Weighted-Average Remaining Lease Term and Weighted-Average Discount Rate (Details)
Sep. 30, 2021
Dec. 31, 2020
Leases [Abstract]    
Weighted-average remaining lease term 5 years 4 months 24 days 5 years 10 months 24 days
Weighted-average discount rate 5.70% 5.80%